Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4eee89646d40387…

MALICIOUS

PDF

70.2 KB Created: 2020-12-07 02:27:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9d8faf2cbac09554e070af0fc4f73fc8 SHA-1: d9991a590f108d9494f0ea8e84e33c817d426d70 SHA-256: c4eee89646d403873cd0d4d710544ec2e921e0c48905843b8c9e61ba639dfd79
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 0.9995

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://traffset.ru/strik?utm_term=princess+tiana+dress+disney PDF link annotation
    • https://tazabojadikeze.weebly.com/uploads/1/3/4/6/134648043/1369231.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc145c30a2757459be55efb/t/5fcacb786e25b61818eabdc5/1607125881501/newegg_promo_code_new_customer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ba3b0a2757459be1f9cb/t/5fc18dfef81c9a2a0cdcde70/1606520318083/best_clone_hero_setlists.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/patapoxaro.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/68799562238.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe20fe64571256540336aa/1606295813108/46283300506.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc106fbd49dd1244734cdd3/t/5fcd209a74a40730fba091de/1607278747645/dazedafoniwimixamobaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea3ced7-a139-4291-a92b-11581ecca4bd/85729920090.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/66036504965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4324fb5b-d880-4f98-9fcd-052e34626767/87331004872.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_off0000d656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD656 5004 bytes
SHA-256: a57960d9f650769b89cf05537def3e7e0eff8e7d231a47283a838aaea98c682a
font_01_sfnt_off0000e76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76B 10928 bytes
SHA-256: da81ea5af611608788671ee91425f929f568b9a725458e9aa3948f6e2e96a09a