Malicious PDF — malware analysis report

Static analysis result for SHA-256 7295981e75b8291d…

MALICIOUS

PDF

74.0 KB Created: 2021-06-04 19:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 86e00762273760862e09294d6bb0e793 SHA-1: 7278478a12a7470d4de93e34225f727402324a66 SHA-256: 7295981e75b8291d2741fcc4df6f277ce811805f6338019368b39d6be81d1a18
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://dugedepap.ru/123?utm_term=film+kadamban+2017+subtitle+indonesia PDF link annotation
    • https://nitaluba.weebly.com/uploads/1/3/4/3/134348735/5542324.pdfIn PDF document text
    • https://pagelenabiruzet.weebly.com/uploads/1/3/4/4/134462778/lekek.pdfIn PDF document text
    • https://velumosatowe.weebly.com/uploads/1/3/4/8/134883763/a1931920323e.pdfIn PDF document text
    • https://vemisalisak.weebly.com/uploads/1/3/1/4/131437925/696996.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382953/normal_5fe3c7f12fee7.pdfIn PDF document text
    • https://xitawameduzip.weebly.com/uploads/1/3/4/5/134511141/1781205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464070/normal_6062a430cdab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451044/normal_600a0eb54b869.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jopamedet.pbworks.com/f/61730164858.pdfIn PDF document text
    • http://fotikeralo.pbworks.com/f/apega_competency_based_assessment_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b361416-8613-409a-8027-44b1ba62e6b0/firefox_47_release_date.pdfIn PDF document text
    • http://nitezug.pbworks.com/w/file/fetch/144494196/how_to_calculate_the_specific_heat.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/f/whirlpool_gold_series_dishwasher_start_button_not_working.pdfIn PDF document text
    • http://nolumemonip.pbworks.com/f/92300631018.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144465225/muzabiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b40ce59-74d3-4269-aab7-1c8d561c5a79/how_to_program_genie_pro_stealth.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_off0000e33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33E 5440 bytes
SHA-256: 8c3700528f87733b952b010edf59c27a7c6117369bf67bf972e5684a76f6b45d
font_01_sfnt_off0000f5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B4 11000 bytes
SHA-256: a942a66aafd00b3613defbd3df80a0ac8c1f197909d3accac06834c34dc8557d

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