Malicious PDF — malware analysis report

Static analysis result for SHA-256 30dedd329f09fe00…

MALICIOUS

PDF

81.2 KB Created: 2021-03-12 19:13:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 296e42c99e21152d9f160b65b0b5bcb3 SHA-1: d2061f9ebaffcb818765463e1875b37e85c0716e SHA-256: 30dedd329f09fe00e6e3c54ff748bfd523b8ffc18941293cfa9f6f17ede5abfb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm pointing to other PDF files. One of the primary external URIs, https://vilenefex.ru/123, is likely part of a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://vilenefex.ru/123?utm_term=brighthouse+email+format PDF link annotation
    • https://rabibenexu.weebly.com/uploads/1/3/5/3/135319922/gadamifip.pdfIn PDF document text
    • http://noxogejukebe.mypressonline.com/55692098332.pdfIn PDF document text
    • https://sumomaduge.weebly.com/uploads/1/3/4/8/134884200/2024915.pdfIn PDF document text
    • http://italy-small.space/zevitomufonaxarqjjdm.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/informacion_sobre_el_albinismo.pdfIn PDF document text
    • http://rapoxarawiwalo.sportsontheweb.net/bisigesum.pdfIn PDF document text
    • http://werenntaq.online/cyberpunk_2077_gameplay_leak_202023t56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487187/normal_601df41da1c57.pdfIn PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/jemejolasujufik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486552/normal_6028b8f0ed351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5feaeb756f245.pdfIn PDF document text
    • https://javevopikaze.weebly.com/uploads/1/3/4/4/134489205/wuxaf.pdfIn PDF document text
    • http://life50it.pro/terasotifotiqa5be.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://ledufowi.myartsonline.com/komemakirurix.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/2233570818.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/labarosanetovuwam.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/shakespeares_sonnets_and_poems_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/how_to_rap_freestyle_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/75877797440.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/bodum_chambord_french_press_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/93528054133.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/irish_exam_papers_2013_junior_cert_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/28022760620.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_off0000f229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF229 5008 bytes
SHA-256: 89958e78f0edda62f8abfa40dfed9946df25ed67ecf22aef06fca25aad515eab
font_01_sfnt_off00010338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10338 11232 bytes
SHA-256: 373565d46be4d950e6d1af531c3539e1c48f0bc7ee5f2ed10a211b958774c1c3
font_02_sfnt_off00012964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12964 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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