Malicious PDF — malware analysis report

Static analysis result for SHA-256 068fcc52c7d834f9…

MALICIOUS

PDF

81.6 KB Created: 2020-11-26 10:35:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9601c3f690d689343e2d652e44aa949e SHA-1: ef35609b45784fc3874d5e14ba65aa7dd12cbd0b SHA-256: 068fcc52c7d834f9e37c5d62a175ea43acdd9a6eb731d791d092fb6827b5ac3c
216 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing lures. The 'SE_BRAND_CREDENTIAL_PHISH' heuristic specifically identifies this as a brand-impersonation credential phishing attempt, directing users to a redirector URL. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xesofizagib.weebly.com/uploads/1/3/4/4/134491847/sakadugomataxapova.pdf.
  • 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://trafffi.ru/123?utm_term=alcohol+to+alkene+conversion PDF link annotation
    • https://xesofizagib.weebly.com/uploads/1/3/4/4/134491847/sakadugomataxapova.pdfIn PDF document text
    • https://limopepubev.weebly.com/uploads/1/3/4/6/134627214/7931441.pdfIn PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/vibugowagasu_jitividuk.pdfIn PDF document text
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/14cc6b2e3e71dd.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/fapizeludube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/81b3e63f-17de-4509-bf8d-011005a279bf/vinajifomigegugorab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae9d334-b437-470c-8714-ba32cb2e73e3/wow_weakauras_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a02264-ee57-4330-a0ec-a279fb4575fb/katagej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf52951-442c-4a0f-b1aa-1afd9da8c435/55837879690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab509e81-5520-466a-aa47-02c0ecebb1aa/diversity_in_families_10th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b64a141c-5ef6-44ec-afe3-6aa56c280d08/gifujoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96bf094d-533e-4fb8-b9e1-502946691f7f/32587832584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a54be059-9850-4cf1-ab44-3900b70e21e5/gusivalixeziw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb109aec-1e16-43e6-b5ff-25b5cdd9f67e/harry_potter_and_the_secret_chamber.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001003b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003B 5000 bytes
SHA-256: 9cb54efc69da821ad50e2b660a8a800b56d5542005aa58771408f5c2e1423751
font_01_sfnt_off0001113c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113C 11808 bytes
SHA-256: d25e3c0f74af11be911962cc9950de7bb1e42b2682744eb9746abf12c1e2b584

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