Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea26037217d85e2…

MALICIOUS

PDF

76.1 KB Created: 2021-04-04 13:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5b5bbd07387583800c65500b819edbda SHA-1: c8e2053d0d2e2e0d795d4b095b8620d4f4da6ee3 SHA-256: 3ea26037217d85e2a58ef0ab0e7cb99892a5f72175c5d756e8e2877f0b800ac9
246 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a brand impersonation heuristic further supports a credential phishing or malicious redirection scenario.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://lowaribopuvege.weebly.com/uploads/1/3/2/8/132814272/1800210.pdf.
  • 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://gimoguvi.ru/strik?utm_term=if+equity+is+%2524300+000+and+liabilities+are+%2524192+000+then+assets+equal PDF link annotation
    • https://lowaribopuvege.weebly.com/uploads/1/3/2/8/132814272/1800210.pdfIn PDF document text
    • https://niniteju.weebly.com/uploads/1/3/0/8/130814631/baxiniwosebapap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454813/normal_5fec6629a72a8.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/argumentative_essay_examples_ap_lang.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/edit_to_word_converter_online.pdfIn PDF document text
    • https://nurivotewifigex.weebly.com/uploads/1/3/1/1/131163684/733792.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/23146.pdfIn PDF document text
    • https://vawuzusafut.weebly.com/uploads/1/3/4/8/134863851/luropezedumove.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426819/normal_5ff0a43e74c6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408702/normal_5fd3108c588bf.pdfIn PDF document text
    • https://ruxikikigiligex.weebly.com/uploads/1/3/4/3/134347308/2e38b09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366398/normal_5ff9da64ac745.pdfIn PDF document text
    • https://xetupowo.weebly.com/uploads/1/3/1/3/131382232/8c9add1221b.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/bissell_powerforce_compact_turbo_2690_belt.pdfIn PDF document text
    • https://rigavimiba.weebly.com/uploads/1/3/0/8/130814992/7a4bd27591e.pdfIn PDF document text
    • https://vevotudoxis.weebly.com/uploads/1/3/5/3/135313682/3434626.pdfIn PDF document text
    • https://sipadaguw.weebly.com/uploads/1/3/4/3/134322090/9745be3a11.pdfIn PDF document text
    • https://losiweso.weebly.com/uploads/1/3/1/3/131380476/sosumuxibo.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/kuwupebul.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
    • http://jisijuvod.myartsonline.com/how_do_i_use_ecg_on_apple_watch_3.pdfIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_771d9f0a19994dc7b71a8c90bfe92be2.pdf?index=trueIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_a6163f13078e45f7acbd2993eb5b373c.pdf?index=trueIn PDF document text
    • http://vebusatoro.atwebpages.com/guardian_ad_litem_wisconsin_cost.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_f895b947ae9a4e8e8e67c7a6ca62133d.pdf?index=trueIn 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_off0000db6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6C 5956 bytes
SHA-256: 6f832b50bd9b99c86bb2792817708e8ab3d573bbb233c94c1abb4c7d9ad37d7b
font_01_sfnt_off0000ef9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9E 10724 bytes
SHA-256: 4fe352a1d631721f53c116e8bfbc5a06362e2ac1fc7122c432231bd9934b41a7
font_02_sfnt_off00011444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11444 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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