Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede779efa9e8dc9c…

MALICIOUS

PDF

68.2 KB Created: 2020-11-19 05:31:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 44f82fd721c8d2276f8352dcc7402ef3 SHA-1: 4326e845b7196dafc62f7a0f4d77e8acb4194f9c SHA-256: ede779efa9e8dc9ce255b0547db63f428c1abd5ed9bc88e55d4858d5543d01ea
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://trafficel.ru/123?utm_term=avast+driver+updater+full+download PDF link annotation
    • https://ligexomapaku.weebly.com/uploads/1/3/4/3/134321337/7ab8d9ad.pdfIn PDF document text
    • https://nixofukotozawe.weebly.com/uploads/1/3/4/3/134313466/xufovujuzodog-fowofuwi.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/3109733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379855/normal_5f95ac86bdc39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386607/normal_5f8d2a6291b3f.pdfIn PDF document text
    • https://kemipopebu.weebly.com/uploads/1/3/4/5/134585234/f9e1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_5fa8f511a2947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f891030ce948.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/tuzamada/words_that_start_with_scrib_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e682287-c561-4eb8-ae5e-9d87f8ccd3e9/fallout_4_misriah_armory.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/bandcamp_er_opera.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/mejemix.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_off0000cd95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD95 5176 bytes
SHA-256: b8a31a7906721894a00af659fba74949e38b68c81cfd4fc92670e7939c8add64
font_01_sfnt_off0000df59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF59 10608 bytes
SHA-256: 286fb8b09e676619e1d5c75a0673ec921b2d31b750abd96da2a5e9a3e790262a