Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d62c55e00a0e4c7…

MALICIOUS

PDF

80.7 KB Created: 2021-05-17 20:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 26513d4f88e2df513a902ef668af062d SHA-1: 5d8c4b85bf84db0bb2b3dab482ae96bcec2c3a20 SHA-256: 0d62c55e00a0e4c7cb8440d084a094803539bf3ab1a3d237842cd24ba0892699
234 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to dafemum.ru, disguised as a product advertisement. It also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are also suspicious. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/strik?utm_term=casio+g-shock+mudman+black+military+watch+g9000ms-1 In PDF document text
    • https://nuvuxupu.weebly.com/uploads/1/3/4/5/134507381/barijewo.pdfIn PDF document text
    • https://pujibotawajifuw.weebly.com/uploads/1/3/1/3/131379639/vefojuxapu.pdfIn PDF document text
    • http://gukevipagopu.mywebcommunity.org/laboratory_safety_worksheet.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/56560707061.pdfIn PDF document text
    • https://xovodozavaso.weebly.com/uploads/1/3/1/0/131069890/wirazexorerelig_banupekuke_zusupoposu.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/patomirote.pdfIn PDF document text
    • https://lokevevivepino.weebly.com/uploads/1/3/4/1/134131736/xegefigoso.pdfIn PDF document text
    • http://saniwigudovo.scienceontheweb.net/gesibafu.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/jijumupade/nice_guidelines_epilepsy_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/will_medicare_pay_for_eye_surgery.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/89834412043.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/how_to_disable_auto_shut_off_heating_pad.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/jowavofom.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/new_army_dress_uniform_pinks_and_greens.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/bass_boosted_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/nexolutamogibezanoj.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/86102099170.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/noziloviputuresebomobezi.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/70028249135.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/13085541058.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/game_boxing_star_mod_apk.pdfIn PDF document text
    • http://kabuzore.atwebpages.com/android_activity_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/89201592279.pdfIn PDF document text
    • http://jemukiguwuw.myartsonline.com/ciaphas_cain_hero_of_the_imperium_download.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_off0000f7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D4 6040 bytes
SHA-256: 5c61f995397bdc998856603ed1bf399b40f4e273f4165331e8c7123404824d71
font_01_sfnt_off00010c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4D 12064 bytes
SHA-256: 9956bc5939d44b976ebb8798e6e9b893d5e44961f27ca14e3b512a5889d24b03

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