Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fb115781a1c6b08…

MALICIOUS

PDF

69.6 KB Created: 2021-01-20 06:40:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b78a3c52b7b2975d6e083374fb677192 SHA-1: ce843e14b24dafc4189067c4e5260906aff5512b SHA-256: 2fb115781a1c6b087493187990884bad35f6d2c867ccb771e1cab35d8c784a43
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, identified as a link farm, designed to redirect users to various websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive external linking suggest an attempt to lead the user to a malicious site, potentially for credential harvesting or further payload delivery.

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://traffnew.ru/123?utm_term=fashion+sketchbook+pdf PDF link annotation
    • https://cdn.sqhk.co/giganopof/hgjklhb/my_block_lyrics_tupac.pdfIn PDF document text
    • https://tinonerapize.weebly.com/uploads/1/3/5/3/135349756/227a9.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxiniraz/ia2CUgh/73690579174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461525/normal_5fa6cef946464.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463010/normal_5ffddb7cefc8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485799/normal_5ffec4fcb21a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423427/normal_5f9d45f2207ca.pdfIn PDF document text
    • https://kiniwotonupit.weebly.com/uploads/1/3/0/7/130776343/60f1e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390051/normal_5fd83395ede40.pdfIn PDF document text
    • https://pavofadibap.weebly.com/uploads/1/3/4/3/134370944/fbc4392864b2e.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/gjUSvhR/eon_music_player_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389823/normal_5fa87840c6a8e.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/401d1a79132b09.pdfIn PDF document text
    • https://cdn.sqhk.co/saseponirifa/Nmnjhge/33721406532.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_5f91ac11069e0.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/jYIgei7/36495163696.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/somamere/71750283730.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/23456465978.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/filmora_all_blockbuster_effect.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_off0000d30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30E 5272 bytes
SHA-256: 67a559aa46ffde96d945c6b5e7eaf8114368d840ddaf066b10cfdce773f16cb9
font_01_sfnt_off0000e4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F9 10676 bytes
SHA-256: 0c556808496329a40f99ef446678879e9f5adcbfbeab04606020b5464016cd60

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