Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d8a1732de5e2d6…

MALICIOUS

PDF

81.6 KB Created: 2021-03-25 17:07:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4acdc07c9f568b2a9824ce4e6254629a SHA-1: c2e51bb26b8c48b249d7f1c79f9a1b0e8bc395ed SHA-256: 62d8a1732de5e2d63bed9d2220a2221cbdb7b496044b4ac25c0b4736158c5bee
156 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 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 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.
  • 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://pelibifir.ru/strik?utm_term=matlab+plot+discrete+points+3d PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376612/normal_603157cce078f.pdfIn PDF document text
    • https://mapaluloxusogor.weebly.com/uploads/1/3/0/7/130739646/vekogitisagop-zaliziwiv-fufedi-kokenudafogok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369162/normal_5fc96ac71a0ba.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/wobawidegix.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/a509d249-cbb6-4c8b-9de7-0b82d52f3acb/xeluzerupaxuzag.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/statistical_mechanics_reif_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0e10de6-6a32-480a-a269-1495566126d9/53839200892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26ac4584-bbc2-4980-8fa9-86da4dc45801/71277178544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2c0017-af71-442a-91d9-37697a555ab7/how_to_use_a_mandrel_tube_bender.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/noxanerugijeroji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/250f74a2-18f9-48ed-8e07-1b902b7823d1/how_long_does_it_take_to_settle_a_personal_injury_claim_in_ireland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8393369-c16f-4bb1-a3be-a475ee846900/20715301922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bca0232e-a90a-4fd9-8337-4792df9098de/vivavinarejururafepinoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1967e557-4e1c-456f-9625-a4d33a74e144/how_to_identify_grammatical_errors_in_sentences.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cd3e757-61ab-4f1a-82de-35b946b1bbdd/the_bitcoin_standard_saifedean.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 7

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_off0000fd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4D 5376 bytes
SHA-256: 500612379a278d477d2ffdf981964ae5150348bfc75c8697960abf3d907e8e5f
font_01_sfnt_off00010fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA6 12192 bytes
SHA-256: 65ed190d9bd7069f91a3a0df7e0873f2cea1d1f760f2c29555d653c8c6f7f414

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