Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb1d34e41834f0e…

MALICIOUS

PDF

77.5 KB Created: 2021-02-16 05:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 620371dacc9b11c5a0fb0dc8dd402883 SHA-1: bbcfb793eba9ca01ffd6f06daa6ebfe22139a0d1 SHA-256: 0cb1d34e41834f0e0530916765875d7e20823da41d1c78833064fdd2e2c1b0d1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, identified as a PDF link farm, with the primary suspicious URL being https://baarspo.ru/wix?keyword=raft+wars+1. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links strongly suggests a phishing or SEO manipulation attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=raft+wars+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374685/normal_60145d307c5dc.pdfIn PDF document text
    • https://gorasanoso.weebly.com/uploads/1/3/1/8/131859135/585b1900a6d5e5.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/biahfjd/99631053933.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/ictBge7/77488974887.pdfIn PDF document text
    • https://cdn.sqhk.co/kamozipu/jaicxje/77713213632.pdfIn PDF document text
    • https://cdn.sqhk.co/papebikuwi/jeYij2D/hansen_s_furniture_modesto_california.pdfIn PDF document text
    • https://livesagu.weebly.com/uploads/1/3/1/4/131437401/1593035.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/hgdBoGI/bujetirifakonojesegof.pdfIn PDF document text
    • https://cdn.sqhk.co/depifozopupe/Vhjhhbi/t_mobile_plans_vs_verizon.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/QGichi0/menexezubenusigibabojili.pdfIn PDF document text
    • https://cdn.sqhk.co/juvowisire/jbShagi/40528615341.pdfIn PDF document text
    • https://cdn.sqhk.co/memenewo/1gehdif/ipl_live_video_streaming_app.pdfIn PDF document text
    • https://cdn.sqhk.co/sobutexe/uhbgigg/45615699816.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/gidrKY7/21830350156.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499995/normal_5ffe603f43d20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474169/normal_5ffe072a2aabf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470836/normal_60183f6759df0.pdfIn PDF document text
    • https://tusagenitig.weebly.com/uploads/1/3/1/4/131452801/leginixi-demipujarado-jonoxij.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/gagagakigibapo/retajasufoxafusujibokuna.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/school_cash_book_software_free.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_off0000f5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AB 4880 bytes
SHA-256: eb8c755dfca545d1cb1e524d7b59a495e4b2519583936dede4fdfc82e1e92724
font_01_sfnt_off00010671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10671 10272 bytes
SHA-256: 80669699ea84f14b5ee13b0a228f986333028429a9c206bceb20abdf8780b8fb

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