Malicious PDF — malware analysis report

Static analysis result for SHA-256 86486d6690d8a081…

MALICIOUS

PDF

96.2 KB Created: 2021-03-23 04:29:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e32ee65ba8bc14f1598b34231af875ca SHA-1: b1fee734fe387c46abf1b62180b7e4564f2e0c3d SHA-256: 86486d6690d8a081fbdb0a6f8fbbcd7474c8c62bdd72509cabe9e1cb2d1dadae
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are designed to mimic search engine results for sensitive queries, a common tactic for SEO poisoning. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and heuristic firings point to a malicious document designed to redirect users to potentially harmful sites.

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
  • 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.
  • 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://dugedepap.ru/strik?utm_term=christmas+card+message+after+death+in+family PDF link annotation
    • https://cdn.sqhk.co/zuretagugaf/hgMieia/sisagisebe.pdfIn PDF document text
    • https://cdn.sqhk.co/pewesopefim/XPSifhe/30887516765.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovusig/GUibjcA/bouncing_ball_advert_song.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rukukuwozar.epizy.com/nuzodofokiwalinovi.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/how_many_calories_is_in_taco_bell_nacho_chips.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/55604626782.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/how_to_access_my_strawman_account.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/starbucks_barista_pay_california.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/data_analytics_course_content.pdfIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_b70f26b174ef4a6c9e055fb5407e3e95.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lomogas/android_bitmap_to_byte_array_no_compression.pdfIn PDF document text
    • http://perurafofasiw.epizy.com/relatrio_de_auditoria_interna_exemplo.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/free_blank_risk_assessment_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/the_whirling_dervishes.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/grid_template_areas_empty_space.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/kanam.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/20421849519.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_99c8e1e5227a4c44a3e5f586ed9abd7e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/xalixoxabefamonav.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/661943563.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B71 5240 bytes
SHA-256: 124a2596e183b30057cb686fc1239d70b209bbbad2e9fb3afb82fccc2f57580c
font_01_sfnt_off00013d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D1E 11768 bytes
SHA-256: 19eba79006acd6fd995a3c62fcc2aedc3bc9d2f9a3fc658c0f2f1f2f9c868e2e
font_02_sfnt_off000164f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164F2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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