Malicious PDF — malware analysis report

Static analysis result for SHA-256 80591fd47f6a9a37…

MALICIOUS

PDF

75.6 KB Created: 2021-03-18 01:07:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc47ad12fc3f1e3744affd220cad84ff SHA-1: e5d0534db290a093e03cd515d43db7c885645df2 SHA-256: 80591fd47f6a9a373634c8652dbd7ecff446927ce2cde6607139a2d3b3a97a49
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, many of which are disguised as relevant content. The ClamAV detection and ML classifier strongly indicate maliciousness, likely for phishing or malware distribution. The presence of external URIs and a link farm heuristic suggests the primary goal is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=pssa+2020+coronavirus
    • https://cdn.sqhk.co/wenoxavawo/6FhihdL/call_dialer_app_apk.pdf
    • http://urro-hu.com/the_curse_of_la_llorona_downloadme2s2.pdf
    • https://static.s123-cdn-static.com/uploads/4421209/normal_5fce6c28d5396.pdf
    • https://cdn-cms.f-static.net/uploads/4389354/normal_60103cb650204.pdf
    • https://static.s123-cdn-static.com/uploads/4393489/normal_5ffd294d295ef.pdf
    • https://cdn-cms.f-static.net/uploads/4382405/normal_6043dc34c1bf9.pdf
    • http://ostanni.fun/86795394733nh6m6.pdf
    • http://armada.technology/what_does_p_d_represent_in_statisticsiyihw.pdf
    • https://rurasaza.weebly.com/uploads/1/3/4/8/134869927/ea1f16e4747b8.pdf
    • https://cdn-cms.f-static.net/uploads/4366045/normal_603574994cc7c.pdf
    • https://lekumoga.weebly.com/uploads/1/3/2/6/132683130/311453.pdf
    • https://cdn-cms.f-static.net/uploads/4369632/normal_6014d79a43de5.pdf
    • http://olivamebel.com/688945067067czqc.pdf
    • https://cdn-cms.f-static.net/uploads/4426966/normal_602f7cd0c2ed6.pdf
    • https://cdn-cms.f-static.net/uploads/4404969/normal_5fe6a064b54a1.pdf
    • https://static.s123-cdn-static.com/uploads/4369784/normal_5ff9c97042496.pdf
    • https://cdn.sqhk.co/sovajepuxe/l8jbgi6/82954693213.pdf
    • http://bigmagazin.xyz/calculus_1_practice_exam_with_answerssvg1g.pdf
    • https://static.s123-cdn-static.com/uploads/4413842/normal_5ff1c4f321258.pdf
    • https://cdn.sqhk.co/duwewofowus/hjjfzhc/magazine_cover_template_app.pdf
    • https://cdn.sqhk.co/zowonefaso/gThdxjd/operations_management_course_online.pdf
    • https://notilapixoto.weebly.com/uploads/1/3/4/3/134397855/tezadafe.pdf
    • https://cdn-cms.f-static.net/uploads/4384645/normal_60314af4209c9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec31.bin
d1a3bc630008ff544c37527fcddb3d102a4be0fc6a47cddef2a65397e8fe565e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC31 5096 bytes
font_01_sfnt_off0000fd99.bin
8f2e3f2f1e6260390da8df3aa688f450b63d08c02601919edb7c2d127540410a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD99 10440 bytes

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