Malicious PDF — malware analysis report

Static analysis result for SHA-256 7672cd753d8e4722…

MALICIOUS

PDF

74.0 KB Created: 2021-05-20 02:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 00db015e57e78ffc8ed85efa156a2242 SHA-1: 713e9bad02a63866d9f0c163268df6a8a9a1a8fd SHA-256: 7672cd753d8e4722cca7a5d8bb5492e918aeeb2605732cd01385215fc985fa83
186 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 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://dafemum.ru/strik?utm_term=raid+bollywood+movie+download+filmyzilla PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424991/normal_60667671a978a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493201/normal_60336150276a9.pdfIn PDF document text
    • https://tudepaweper.weebly.com/uploads/1/3/4/6/134607512/pusododebuwavodafod.pdfIn PDF document text
    • https://fejuratomejavud.weebly.com/uploads/1/3/0/7/130776174/9379562.pdfIn PDF document text
    • https://rodedewosesuge.weebly.com/uploads/1/3/6/0/136010241/7537897.pdfIn PDF document text
    • https://silukirajewulo.weebly.com/uploads/1/3/2/6/132695932/govesoza.pdfIn PDF document text
    • https://bimefitovaj.weebly.com/uploads/1/3/1/4/131437299/jilized.pdfIn PDF document text
    • https://jelezasi.weebly.com/uploads/1/3/5/3/135347821/1330fcf15.pdfIn PDF document text
    • https://jobexevufurol.weebly.com/uploads/1/3/4/5/134526996/jebewafuxafuzig_vupimokar_bipopudakik_wuzoduzurus.pdfIn PDF document text
    • https://wumibopoz.weebly.com/uploads/1/3/4/5/134511789/vobexojo.pdfIn PDF document text
    • https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/kixidemowirumif.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/4096847a-358e-4e5a-b64c-cd823023d8f9/how_to_connect_ihome_reflect_to_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/158c8fc2-8e34-4b3b-b398-330bd2ae43b1/how_to_make_zentangle_art_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f6a8d6-08f4-468e-b22d-dcbfc1fc0adf/geometric_invariant_theory_springer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/137af71a-f158-48b9-a9dc-3d266bbb7fc6/15887236854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcfa9df4-f722-49d4-80e5-c497cfbcac26/bexilupad.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_off0000e28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28F 5232 bytes
SHA-256: 895ab81bc25f55af8fcb344d27fd4f368a948ec89fb566d9f6d77fb2eabb56a1
font_01_sfnt_off0000f47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47B 11308 bytes
SHA-256: e1f6ba07c1af251b16b1d8d0ea57cb3605cc0558db18a256f7d64510c7446203

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