Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4dd005c0e6472d…

MALICIOUS

PDF

93.7 KB Created: 2021-03-15 23:07:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7d949b114d286abc069f5a3e257f782b SHA-1: 162521b75cd16a31e96b95b35e3303ff6eaa7101 SHA-256: ce4dd005c0e6472d4f4f6d5c12468600d8bcc6ed581a93f08607ba3c6cbff8be
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a remote-support lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://jottigo.ru/award?keyword=mastering+blockchain+andreas+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459322/normal_60091256341c2.pdfIn PDF document text
    • http://unosital.space/foxapabipik2gv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447888/normal_603084dac2c2b.pdfIn PDF document text
    • https://jexiliwole.weebly.com/uploads/1/3/0/7/130739190/vibezajedegimope.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485434/normal_5fffeb20173b0.pdfIn PDF document text
    • https://rakafofolobe.weebly.com/uploads/1/3/4/6/134649319/ragejoduwodugujibiza.pdfIn PDF document text
    • https://voxonexagigiwal.weebly.com/uploads/1/3/5/3/135346225/mukemimivosi_kurawusixu_jomiduxeken_jiwoboxifogosiw.pdfIn PDF document text
    • https://govoxarenaja.weebly.com/uploads/1/3/4/8/134874143/kufililaburiz-dusugi-luzofo-pumuz.pdfIn PDF document text
    • http://sait-ok.ru/a_song_of_ice_and_fire_characters_neds_daughterv94hj.pdfIn PDF document text
    • https://bitoxogosem.weebly.com/uploads/1/3/4/3/134386372/641713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_5fea166b883db.pdfIn PDF document text
    • https://sipizoreju.weebly.com/uploads/1/3/4/1/134131451/zipobidu.pdfIn PDF document text
    • https://notowupoguja.weebly.com/uploads/1/3/5/3/135316513/d5c65e8cfc490.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puzegekizizovin.epizy.com/74463077195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07945f1b-ed07-456f-b00a-8fe47017ef7b/58952936024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e8682e3-c1d9-42b1-8c7e-d905a3a756ad/38011331880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e3462b7-3bcd-4159-b137-a2dfbc6810bc/learn_siemens_plc_programming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de4cefe9-a68b-42f0-bdaf-997b23a1df94/48192469401.pdfIn PDF document text
    • http://valapapiwusujeg.rf.gd/70103836870.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_off00012f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5B 5628 bytes
SHA-256: e1dd5a52634b9782508618688d2e1ca41508ca212ffe2f62ef91c264295d884e
font_01_sfnt_off00014281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14281 11672 bytes
SHA-256: b6e702ce741e34fe8ca88a7c46f0255d68035c7cf01920093e575d889623d6e0

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