Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8f2f5879b949b0…

MALICIOUS

PDF

70.6 KB Created: 2020-12-19 19:39:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 10d5e8971d0e0d141020074ef3334eed SHA-1: d0cf393ccdc94b77467ae31de424baf16fe47fbd SHA-256: bd8f2f5879b949b09f812ad927359df0398a531992bbf7501fe6eb99c733799e
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 0.9997

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://trafffe.ru/123?utm_term=wholesale+flowers+san+diego+location PDF link annotation
    • https://kapebuzuzevasa.weebly.com/uploads/1/3/4/5/134587117/gatiz-texovebajivuxer-fofasom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445736/normal_5fb2eed7a099c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5f9272faa913e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_5fd7f1f555558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456116/normal_5fbf66ceef1e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481053/normal_5fd5f27d74f3e.pdfIn PDF document text
    • https://puzujesojanigo.weebly.com/uploads/1/3/4/5/134504435/97efdec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_5fbe2178f4090.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/kegubinefuda/gold_dissolves_in_aqua_regia_forming.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/maps_for_minecraft_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/the_isle_carnotaurus_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/approved_bbl.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/pharrell_tattoo_removal_before_and_after.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc504e1085bf90c0e179981/t/5fcf6a1f3fa051062b473c72/1607428639914/52861219551.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_off0000d615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD615 5388 bytes
SHA-256: 2090aba5aaafd41b64e4d19c460fcb411cf237b1d5fdcf85d1ddf2ce0d8ff3cd
font_01_sfnt_off0000e87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87C 10924 bytes
SHA-256: fdd87b77f27ec055707ac4450a26c9d0b6e8d83be4778d55c42a4a20dfef7c78

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