Malicious PDF — malware analysis report

Static analysis result for SHA-256 679411e20e088a63…

MALICIOUS

PDF

72.6 KB Created: 2020-12-30 23:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7010b16bbd1ca33cedd8f67c4ed92743 SHA-1: 305e0459aadbc135f8c2a962fd3b581127fc2b23 SHA-256: 679411e20e088a639fcca46ffc6df62d39468413d2a923801edab1cdcad6e69a
244 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a high ML score. The document contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/strik?utm_term=monkey+shoulder+cocktail+shaker In PDF document text
    • https://vitogewixetodot.weebly.com/uploads/1/3/4/4/134445825/xazesivefi.pdfIn PDF document text
    • https://widubemevojapo.weebly.com/uploads/1/3/4/3/134320166/bb4a3cd66.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/hbphgic/lego_batman_beyond_gotham_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/jayegjN/nails_for_you_waukee.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/08b153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f8b0f681dbf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413120/normal_5f9c6cf831e16.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/iiidFxP/final_fantasy_xv_ps4_review.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/2b596d20.pdfIn PDF document text
    • https://cdn.sqhk.co/likafupat/2MgiDib/cops_shot_knife_wielding_man.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/012d6372-e8a1-42bb-b18a-91516b59d7b6/67909555042.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/flowers_photoshop_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386afec9-61dc-4972-9820-b96b95e9dc2e/ups_managehr_com.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/tivuwamojikedevomekexo.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_off0000dcdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDF 5196 bytes
SHA-256: 98799e185bf6b3099246a4a833ac26ceddb0c29145048b8ce44372bf47e106ff
font_01_sfnt_off0000ee97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE97 11500 bytes
SHA-256: 9cf1ce7e99410b3d3d24ace9c68319413104deda2001bf82deefff4eb3e9b72c

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