Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d429fd8a7e5975d…

MALICIOUS

PDF

79.0 KB Created: 2021-03-06 20:23:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fda9d05b92e7827c045424e9789c4de0 SHA-1: e75783874f4fac93e77421d8040717f35509c8d4 SHA-256: 6d429fd8a7e5975dc6659e82cdb7c2379a610c10c81c183a0b7aaaa5575ba5e0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=adjectives+that+start+with+h+to+describe+someone PDF link annotation
    • http://bit7.top/beretta_a400_20_gauge_manualcdeds.pdfIn PDF document text
    • https://farunekigevizaj.weebly.com/uploads/1/3/5/9/135976182/17c7a81cae20478.pdfIn PDF document text
    • https://solusolifodijal.weebly.com/uploads/1/3/4/4/134433047/todegugituru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_602b375db04bc.pdfIn PDF document text
    • https://wujumumokujot.weebly.com/uploads/1/3/4/6/134613036/xofaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483388/normal_6031857278f73.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/cover_letter_resume_template_google_docs3qwiu.pdfIn PDF document text
    • https://jesipawuba.weebly.com/uploads/1/3/0/8/130874316/8601591.pdfIn PDF document text
    • http://sedouche.xyz/ls-prepost_manualcpk4v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_c60d5eafd8c549c7b822c7a945aa84a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/63077846452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f020a23a-2dca-42d1-b0e5-960d9276d93a/eat_what_you_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/amos_mro_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da2ac168-5c05-4a27-a1b4-3c632976bcd0/bersa_thunder_380_cc_laser_sights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83c8f7fe-92bd-486a-b515-271cc6295ae2/19942613929.pdfIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_0c3c7787bed34ccb996116de007df7c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/95481718808.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD2 5292 bytes
SHA-256: c201b649cff40c8fc7acb09d667c55a2ce4443d4dfe21102c6951f41316ad6db
font_01_sfnt_off0000feb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB5 10000 bytes
SHA-256: 0ce02ebf3527a47a3812c78f06cb7816e976ba90a08e2cfbb771284367490e54
font_02_sfnt_off000120ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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