Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a2f8d6bbe918d3…

MALICIOUS

PDF

114.3 KB Created: 2021-03-13 13:21:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9b77317865f6c83bfa43b021d15008cc SHA-1: ddb5a3e058f3b0cdec71462d84191142bf6fa441 SHA-256: 82a2f8d6bbe918d323ee8662fbe576729787600eebfc5283bc19349a805b5672
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, many pointing to disposable domains, indicative of a link farm or phishing operation. The presence of a URL with a 'utm_term' parameter suggests an attempt to track user engagement with the lure. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest it's designed to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9610

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/123?utm_term=shapeless+formless+definition PDF link annotation
    • http://wssummer.space/546038476109a6y5.pdfIn PDF document text
    • https://tefufujilidawa.weebly.com/uploads/1/3/4/5/134578337/7f2a16.pdfIn PDF document text
    • https://gitutibilaralib.weebly.com/uploads/1/3/1/3/131384503/9020fa5390.pdfIn PDF document text
    • http://namsinc.info/modern_crochet_patterns__designs_for_the_minimalist_maker2logp.pdfIn PDF document text
    • https://fivujage.weebly.com/uploads/1/3/4/3/134316273/84237a.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/gadik.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/128137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_6025b26c3bdd6.pdfIn PDF document text
    • http://premiumpornclips.com/bakewukuvaxy590.pdfIn PDF document text
    • http://insurancecarusa.com/32769169502woiek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420031/normal_60338ae35979b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370764/normal_5ffc92318441c.pdfIn PDF document text
    • http://internet-babki.ru/galanodopekuwiw528j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_7ce102c8eecd4865849dcb4effa62f40.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/brother_mfc-495cw_ocr_software_download.pdfIn PDF document text
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_89c3d8dd6d064585a34285ae2925e01b.pdf?index=trueIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_c84ca017c4b84cf6b4841897c6bc1f55.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/83cc2691-fcb7-4c1a-9585-caf98f90849f/what_is_another_word_for_tag_sale.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_493083bf25604b4ca1e30b403cff7082.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a0d106-ce91-4cae-99ec-764c4e03dda7/number_flashcards_1-30.pdfIn PDF document text
    • https://e39bfc17-a898-4016-ac91-fc9303c112df.filesusr.com/ugd/b5068a_e90f1c90cad34f819a34e8a14d20b677.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/is_tv_analog_or_digital.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off000180e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x180E7 18176 bytes
SHA-256: 36bf4bca2dbe62ed7eea770f09dcbd942e9f30cdfd175f8627c1a83adfc01dda
font_00_sfnt_off0000fa94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA94 5684 bytes
SHA-256: e0f0922da2f1b5a441c0ab47f148b203928c2bc4519f23812ab58bc0699b7f5d
font_01_sfnt_off00010e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E70 5172 bytes
SHA-256: d94943d67acc201a4d88889cc7eb5d3bdfdb4d7b7eca74408a75e41eda41b7ee
font_02_sfnt_off00011fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCF 2656 bytes
SHA-256: dbaab8dcf32bfe64cb008f34eb54f5316f62236e8dffe3de49b44225404383a5
font_03_sfnt_off00012ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD3 2328 bytes
SHA-256: c42118b51b061dffbc196cd4866a2cf76d9f31ae9d0a8f6c06e6ad224a677b24
font_04_sfnt_off00013588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13588 2108 bytes
SHA-256: 806d12f4c18e044784d20764d58024893796e88f204c306662924b3e907cbcac
font_05_sfnt_off00013f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F53 6640 bytes
SHA-256: 2da83060ad210a9a1743b04a22b2cc5ebb14ba7af64fbaa5f25da2d26a1b3d84
font_06_sfnt_off000150f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150F1 15776 bytes
SHA-256: 1e2d40f3e45d9398a5cd0818f1ef20c2675d8381f72926cf9a1d2fbc4f38ac27
font_08_sfnt_off00019d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D77 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
font_09_sfnt_off0001ab7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB7A 3276 bytes
SHA-256: c6f56f051084033b0538cdf61e3e457d22b7f2c2ea46d10ec59ebb2b81e63971

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