Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7624be26be43e6b…

MALICIOUS

PDF

72.4 KB Created: 2021-01-15 13:50:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b8d1d1ad092f8c8a94b1ce1f723897e0 SHA-1: 45c05f90c6a3bbdc5d509150fb69d3fd8e7c68b2 SHA-256: d7624be26be43e6b85884f5bafb876bf345c654c8f464f7393bf4b665afa3f94
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a PDF SEO link farm. The document contains numerous embedded URLs, with the primary malicious redirector being 'https://traffine.ru/aws?utm_term=eu+gmp+guidelines+for+clean+rooms'. The ML classifier and ClamAV detection further support its malicious nature, indicating a phishing or malware distribution 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
  • 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.
  • 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://traffine.ru/aws?utm_term=eu+gmp+guidelines+for+clean+rooms In PDF document text
    • https://site-1174025.mozfiles.com/files/1174025/57201615132.pdfIn PDF document text
    • https://cdn.sqhk.co/jalosemuv/zhgidjj/zavukesolak.pdfIn PDF document text
    • https://site-1176882.mozfiles.com/files/1176882/how_to_draw_scary_monster_eyes.pdfIn PDF document text
    • https://cdn.sqhk.co/dugubupa/jh2Z5Rj/36804854505.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/gTjbgiV/my_pillow_promo_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405641/normal_5feda05ed4fc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379477/normal_5fca3856b941d.pdfIn PDF document text
    • https://satuvimafinob.weebly.com/uploads/1/3/0/7/130739393/jazokuxazibuz.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/ijRB2gd/scholastic_ewallet_login.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/rejiner/angular_forms_npm.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/play_hard_song_hardeep_grewal.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/cinema_4d_r18_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/smite_minecraft_enchantment.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/best_foam_sheet_for_sofa.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_off0000dcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF4 5432 bytes
SHA-256: b0996c8922a2d020a28fa4ea323a7dd73b2d35bd6402be22d72284bad64fc742
font_01_sfnt_off0000ef60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF60 10996 bytes
SHA-256: 6e147cc65fe3c75f5a1d5b9e119c76d36047e67566e98ccae5882ca986bb3835

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