Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e44a5173e4f851…

MALICIOUS

PDF

84.7 KB Created: 2021-03-15 08:26:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ade38b0de13f82a1ff88f894a902d4b2 SHA-1: c132afdddd5e07e9ca7237bfef7c4be2232bdc9f SHA-256: a2e44a5173e4f851a2b2c4757a44c1cd5df96c47a5b4b04472124afb48bdf3b2
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are indicative of a link farm. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags this behavior. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://mezovuduw.ru/wix?keyword=airpods+pro+manual+paper PDF link annotation
    • http://eslife.pro/raninikiwonivafadokimmjx2.pdfIn PDF document text
    • http://ipai.online/2018_indesign_calendar_template_freepn3ep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467975/normal_6019676430262.pdfIn PDF document text
    • http://daxumokavokawu.iblogger.org/book_of_troth.pdfIn PDF document text
    • https://cdn.sqhk.co/gukisafuw/hdoihtC/bakapukuxatuto.pdfIn PDF document text
    • http://ig-socialmedia.xyz/96638246830u7zbq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_5fd0f00046fca.pdfIn PDF document text
    • http://xigosilefonaboj.iblogger.org/18323658696.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/gGibhdu/17844937046.pdfIn PDF document text
    • http://naturwow.space/communism_name_meaning_in_urdu580zj.pdfIn PDF document text
    • https://cdn.sqhk.co/nakotuba/jatI6gf/hexaware_technologies_stock_price_today.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://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_f160055820684cb094bbc4d60d26a00a.pdf?index=trueIn PDF document text
    • http://sozofini.epizy.com/topapiposadonuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/840520fe-06b3-4903-9e10-186845c468c6/budizuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/126963a0-a10f-4589-a50d-bede9a531ad1/boutry_trombone_etudes.pdfIn PDF document text
    • http://wesijulevevomo.rf.gd/tenenizizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88771a52-12d4-432a-8cf1-2813deaae84f/87522544163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1053574f-5189-4fbe-b755-d33efc668ef3/61878187355.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_c469d2b9686b407684a2d5c843e48c23.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB34 4896 bytes
SHA-256: 335ef124d2389835d869665f43b43e38550a2d67745ce16aa93ae87b860227a5
font_01_sfnt_off0000fba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA6 11424 bytes
SHA-256: a882d0396fa94fb0884da46f6d0498fe6d6aa4cad14c6ff4a44f78826c682b3e
font_02_sfnt_off0001220a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220A 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
font_03_sfnt_off000136d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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