Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7552668ead50c4…

MALICIOUS

PDF

76.9 KB Created: 2021-05-30 07:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: eb219c2a393314ad2f6e76b9d43d6f3d SHA-1: 2ccdd384f0e863dfe9f70a865f74bbdb42928003 SHA-256: cd7552668ead50c43cb0114b0e90c8b25784df6b708b74b95412baac64132aa1
186 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains a significant number of external links, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the nature of the heuristics indicate an attempt to manipulate search engine results or redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=motorola+cp185+programming+cable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379387/normal_6052b5351e64e.pdfIn PDF document text
    • https://xezolemi.weebly.com/uploads/1/3/5/3/135324657/zikunadiminibu-dupuvugodo-fibevonebakawin.pdfIn PDF document text
    • https://kidodizaramaba.weebly.com/uploads/1/3/4/0/134096495/vupono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471091/normal_604ee360cdfa0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464077/normal_5fcdb0dfbeca7.pdfIn PDF document text
    • https://lakiregatu.weebly.com/uploads/1/3/4/5/134589313/6137759.pdfIn PDF document text
    • https://sedarujewajoto.weebly.com/uploads/1/3/0/9/130968957/mekipifo.pdfIn PDF document text
    • https://wivaxuzavegisi.weebly.com/uploads/1/3/4/7/134769578/kisaveto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479213/normal_602c8735e26de.pdfIn PDF document text
    • https://palajuwasodix.weebly.com/uploads/1/3/2/8/132815908/bubozuzobixo_pufadatizuzo_fufun.pdfIn PDF document text
    • https://nitowapesapu.weebly.com/uploads/1/3/4/4/134442046/d797cf3fc40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496216/normal_605656a2a3ef5.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/8d5c0d9d-dfc8-4dbe-bb23-5c0c55b223ec/samsung_2333hd_stand_removal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/add2e098-e47a-4ece-8e4b-064c500c5e7d/noxiwina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3fa40e7-9e8f-4e51-9a1c-d0a28b9da5f6/my_complete_system_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b2c41c5-0585-488b-a40d-836fb402869c/zuwawotibixodizajulomige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/070aaf57-850a-4548-8d2a-9654e9e5d79b/44201540579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d211502c-f94b-4722-a2ca-58eb7a90e2b1/barikujowajevidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a894b254-32d2-46ce-bcfd-089274cc7d73/how_to_use_hoover_floormate_on_carpet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aa1de80-9e52-45ca-a151-d335291d98a8/tajup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b994746a-1a03-4a8e-9836-7995afb24d62/34331789464.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_off0000e717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE717 5588 bytes
SHA-256: 88e3914d0258e31aa2fa1abdb109a5b6550ac27d6b6d47493b3679aa4a1f5999
font_01_sfnt_off0000fa1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 13676 bytes
SHA-256: 5a351d9fd0bbc6a79d4b3127153747d7d9499ae9baa138564b38bd8e8b1a25fa