Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dce678e0576b2a…

MALICIOUS

PDF

84.2 KB Created: 2021-01-10 11:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1e7e5904f0202f619747c7c24ff5b4f4 SHA-1: 7569ba90a5c225675208d206d6107fdea9a38975 SHA-256: e2dce678e0576b2af8090eac650c84e2b12cf0825c2336d8c8d0e432cd037041
214 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 `https://gettraff.ru/123?utm_term=final+fantasy+14+armorer+guide`. Additionally, another critical heuristic indicates a PDF link farm, with one of the links being `https://s3.amazonaws.com/xewamejixolefaj/smart_voice_recorder_apk.pdf`. The ML classifier also strongly flagged this PDF as malicious. These findings suggest the document's primary purpose is to redirect users to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/123?utm_term=final+fantasy+14+armorer+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_5fb5c393be795.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/gihjbia/loxemeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465565/normal_5ff130b40ce29.pdfIn PDF document text
    • https://bopiwode.weebly.com/uploads/1/3/4/3/134367631/nerazox-dozanomafub.pdfIn PDF document text
    • https://galezarulunozip.weebly.com/uploads/1/3/4/8/134896955/87fe2fdae3c6.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/bavajedagigubupa.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/igjhQhj/23642287442.pdfIn PDF document text
    • https://wupuvogobed.weebly.com/uploads/1/3/4/5/134507139/a366d624bd119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8ca80d5ac72.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/xewamejixolefaj/smart_voice_recorder_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/laser_cut_metal_sheets_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/fmea_templates_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/best_whatsapp_status_in_tamil_video.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/master_scheduler_job_description_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/10505193009.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_off00010ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECC 5424 bytes
SHA-256: 9d43202aa040cb717af82b5c04a02ac9b3600579739e25fec73958e9d88d7505
font_01_sfnt_off00012140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12140 10016 bytes
SHA-256: cddc0c572dcfb76fd94d54efa4c5e60fdba5b2ac5d66d2aa98fad5b6513ac427

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