Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc35c7489e1d2dd…

MALICIOUS

PDF

74.2 KB Created: 2021-01-05 17:29:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: db65590dd76ecbe1d22f88f9656cfb71 SHA-1: 4a3e4f31b0c5806b23464c2b1d9dc2a6f87e4047 SHA-256: 6dc35c7489e1d2ddabb4fdee053a5ac1b8ed75a76c89ba00287fe682bf5b0da7
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=anabella+hotel+anaheim+reviews PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465396/normal_5fa3536d48e83.pdfIn PDF document text
    • https://xiresipi.weebly.com/uploads/1/3/1/1/131164504/379182370ae.pdfIn PDF document text
    • https://wiworixoso.weebly.com/uploads/1/3/4/3/134321663/d649774.pdfIn PDF document text
    • https://sutafosuteloxep.weebly.com/uploads/1/3/0/8/130814172/3325146.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/mejifavo/2011_mustang_auto_to_manual_swap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cf1ef1b-7f62-48fa-b661-c31851917fa0/89097749644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ef3c97-8b71-4dd1-80b5-bb69e8898668/modagavilud.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/nojegoletinufuzexeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c52c31b-a2d2-43f6-b091-4b3597803817/tatokazuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8340594-6723-4068-960d-1b5112774ecc/72366661190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49ccf39f-fec1-4206-a31c-9b170040199e/andrew_jackson_spoils_system_significance.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/2_step_algebra_equations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07f82304-887e-438f-b83c-6a2f0b0b7fb5/warforged_titan_3.5.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/happy_birthday_photos_hd.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_off0000e334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE334 5204 bytes
SHA-256: e69f2fdd6adc47bd51e2c7f84fd6ed4ff43e9fc450c578e71d3a590826235369
font_01_sfnt_off0000f4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CC 11680 bytes
SHA-256: 076ada3a46cf1a0fccefe3e04c4e88120ab5958e64ec68fca3aca471b55d1f68

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