Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad8978d4fb4bc09…

MALICIOUS

PDF

73.0 KB Created: 2021-01-03 12:28:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3352b8c33695345291779943a18038db SHA-1: 2a28e0b663e1f9c9d0ee1838819330e76a6369fd SHA-256: 2ad8978d4fb4bc09919d98a88d78a70494d4a1c594c3880680f6a76da1c1a3ff
126 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 embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-10044375-0' strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of multiple external URIs suggests the document is designed to redirect users to malicious content.

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 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/aws?utm_term=jeep+compass+reviews+2014+consumer+reports PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/2b7e13a68ac087.pdfIn PDF document text
    • https://cdn.sqhk.co/bagekaketox/NhdsnG5/migopaxukitewefefonoto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478932/normal_5fae7827f2394.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/cjjgiFj/snappers_key_largo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_5fe8b3da3fe49.pdfIn PDF document text
    • https://cdn.sqhk.co/bizifabov/5iehhB5/building_guidelines_and_requirements.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_5f8aaa715284c.pdfIn PDF document text
    • https://fadirepux.weebly.com/uploads/1/3/1/4/131438814/816ba.pdfIn PDF document text
    • https://wivozodibadire.weebly.com/uploads/1/3/0/7/130775536/3256945.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/6431815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422914/normal_5fda4b2433e02.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/501470.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/cd6b6f81-4045-4f7f-88d4-70a58b9fb300/screen_lock_pro_apk_4.3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bd7e96e-3e45-4778-8f5b-86c79461d340/sdgood_scroll_saw.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC1 5604 bytes
SHA-256: d3ea4493ae25f28bd226083f9044ed988a73be520a8ca8ae2649ff59f7373d79
font_01_sfnt_off0000f2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D4 10616 bytes
SHA-256: 61e72ed4abe274d002316ea6814b2b3335f501ab0bfb04a3695595b1ca30e168

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