Malicious PDF — malware analysis report

Static analysis result for SHA-256 32db283d32740e24…

MALICIOUS

PDF

71.0 KB Created: 2020-12-30 17:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 65b641aa964654d044d6dcf23eb990c0 SHA-1: 16ff0e3b94ec09f8c299861b862164611214ae66 SHA-256: 32db283d32740e242d6ccdf50d529873f7f4c39522212b1bf81e34ab9bb81c85
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/123?utm_term=letter+to+my+daughter+from+dad+in+heaven PDF link annotation
    • https://lirurarupo.weebly.com/uploads/1/3/4/7/134770738/4653656.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/koxutosozu-xifuxo-vosezi-wonariweseged.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/utjcidW/primo_microgolfoven_aldi.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/basixiralopevajekubu.pdfIn PDF document text
    • https://pezufefak.weebly.com/uploads/1/3/4/8/134865979/e90dd.pdfIn PDF document text
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/tonid_genet.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/ij3gcja/63867676345.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/264232db-c31a-4d8b-9722-0f4e5ff075f2/gegubixog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c6cfe9a-f58a-455e-b55f-d5fc264acd1e/78951107146.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/duvuxevitiwinebotunida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe4519f-07b4-427a-9058-05f3a42a1629/minecraft_bedrock_education_edition_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab41600-aee2-4648-be03-78562ebd4734/jeep_wrangler_grill_inserts.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_off0000d9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C2 5212 bytes
SHA-256: 2c4ca31dcfd207e817a05ddfd8721494392d27d241747a2eab38870ab8e3186a
font_01_sfnt_off0000eb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6A 10328 bytes
SHA-256: 22498bb7ec1070e43316dff57d15c94685238b65679abb785cff1644643f8f2d

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