Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6e681105d38bf8…

MALICIOUS

PDF

114.4 KB Created: 2020-11-20 21:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4738335dc24d6d10914b82065615964d SHA-1: 175883d2d59bf3dfcd52e742729341de94ce12fb SHA-256: df6e681105d38bf8b8b72100fa935e0cd7b31b14a61decbceea58f4bfd1c2d03
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://trafftec.ru/123?utm_term=freud+router+guide+bushings PDF link annotation
    • https://mutosonagok.weebly.com/uploads/1/3/4/3/134316738/b4bbe75846795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8a6a6f178bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_5fa083212c433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_5fa68985c8729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_5f9293f7715fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392869/normal_5f91600595d42.pdfIn PDF document text
    • https://galesarenad.weebly.com/uploads/1/3/4/3/134380117/7678055.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5f8f3938ec7ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_5faaa2f2e7943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387565/normal_5fabb1b2ce595.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
    • https://s3.amazonaws.com/kakekojezutok/78618183593.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/batezerodapinude.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/st_johns_fl_property_taxes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb8e8ec-aafb-424e-ac7c-7b51e2635a98/fejemufewofuxavavurifeg.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/fuchs_lubricants_msds_sheets.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_off000174aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174AA 4820 bytes
SHA-256: c650a3d73aeadf44a052602c6f706efe77d9fc23b019d412191e2391263aa63e
font_01_sfnt_off000184fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184FE 12232 bytes
SHA-256: bfa02ce2f1c5af6eb989e936a249cbb36e06fd77719f8df7deefbe419c6ae0dd
font_02_sfnt_off0001ae1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE1F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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