Malicious PDF — malware analysis report

Static analysis result for SHA-256 b805b2800aa8ed99…

MALICIOUS

PDF

74.5 KB Created: 2021-02-26 12:12:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6e93efde8a63b824de1b118c47a5406f SHA-1: 3e0f7236a6e5512e5e6a8b29de895bcfcd6d36ec SHA-256: b805b2800aa8ed9957f53f21c0e2dffe2d4502ef20a3dec838f22f75a66915a1
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 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 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://dugedepap.ru/award?keyword=echo+weed+eater+srm+225+spark+plug PDF link annotation
    • https://cdn.sqhk.co/nekuripafi/JxijBgg/lullabies_relax_sleep_baby.pdfIn PDF document text
    • http://igcopyrightclient.com/surah_al_waqiah_banglajqq8q.pdfIn PDF document text
    • http://003-center.ru/moviesda_tamil_attagasam_full_moviezduxq.pdfIn PDF document text
    • https://jidugurulepapol.weebly.com/uploads/1/3/4/3/134310086/8690272.pdfIn PDF document text
    • http://lavkavkusa.store/castle_learning_answersjh799.pdfIn PDF document text
    • http://pavuzebeveju.22web.org/894386681.pdfIn PDF document text
    • http://help-igcopyright.xyz/459864238116ku7k.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/135a5.pdfIn PDF document text
    • http://kwini-fini.online/zarubuzedizubumuxivuvenipu1fq0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/space_quiz_questions_and_answers_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/63202497620.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/99954193979.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/86650503079.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/abnormal_psychology_notes.pdfIn PDF document text
    • http://gexusapinofuvep.epizy.com/pebinilemufulenenapebe.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_off0000e492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE492 5856 bytes
SHA-256: a4d9df085786a072f8399086b95137c209c4e2473dc575b0521d7559f8962d71
font_01_sfnt_off0000f870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF870 10704 bytes
SHA-256: e7d01b7158f0106031e56056f5de8c9223b64161d125f2310cf869db75ab5d40

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