Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df58a84f53b2a62…

MALICIOUS

PDF

71.4 KB Created: 2021-02-27 17:34:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5d574d9d2b5fa6ff48b3aad4ff81ca0a SHA-1: db2a926c229f7d831139952473ad7f1c4bb903a5 SHA-256: 1df58a84f53b2a624eaa948ec72a77ca99466d45405be4fd8c5d3738fe3d25a8
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=whirlpool+model+wmh53520cs-6 In PDF document text
    • https://dopubitiru.weebly.com/uploads/1/3/0/7/130776304/ce0a8a2.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/169d4ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_60264575dbf9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_6024455c8a8ae.pdfIn PDF document text
    • https://fivujage.weebly.com/uploads/1/3/4/3/134316273/gibonodedaxam_radezixonixak_gugulujimupeb_belerosiwo.pdfIn PDF document text
    • https://nabaladeso.weebly.com/uploads/1/3/1/4/131438379/dafuj-sokeke-gaxepes-xozen.pdfIn PDF document text
    • https://dapeborax.weebly.com/uploads/1/3/0/8/130813135/4388390.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/g3hjthh/73910190594.pdfIn PDF document text
    • https://tebojejuket.weebly.com/uploads/1/3/4/7/134764489/lutewesoserove.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/putoros.pdfIn PDF document text
    • https://sepiboberad.weebly.com/uploads/1/3/1/1/131164555/3531939.pdfIn PDF document text
    • https://tunibedexorole.weebly.com/uploads/1/3/5/3/135350281/wegoxawezilezibubine.pdfIn PDF document text
    • https://nalodewemutut.weebly.com/uploads/1/3/1/1/131164475/1150444.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/Wjfzijg/koala_kai_dojo.pdfIn PDF document text
    • https://nedosadowizo.weebly.com/uploads/1/3/5/3/135347652/c022596bde.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/hhWwjih/fazubirokuvopa.pdfIn PDF document text
    • https://dojoxokixen.weebly.com/uploads/1/3/4/8/134878929/salufuvirebojolulofa.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/fedufiporara/celine_dion_i_m_alive_mp4_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_off0000ccad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAD 5956 bytes
SHA-256: 8ba6ea4f795dd57cc36fe1841afd04091708239566b04fa9e5a167264b9028ce
font_01_sfnt_off0000e0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E7 14408 bytes
SHA-256: d405c822604e5a0d91b745046befa44cd099ddcc78d0a0fd2ee3afeca8cbee4d

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