Malicious PDF — malware analysis report

Static analysis result for SHA-256 8735fcb05e324827…

MALICIOUS

PDF

71.3 KB Created: 2021-03-04 14:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: aeed6f6361bf06b4f99b76a5b764d1ee SHA-1: 5673dc3fea72be7b3509308bfd880d7710280268 SHA-256: 8735fcb05e3248271417388ff0e7d88d954aaa194a763d9045bdae8b4474098d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the link farm indicate an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/wix?keyword=pegasus+faucet+replacement+sprayer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369494/normal_603f1450437b8.pdfIn PDF document text
    • http://tejajugumoneton.66ghz.com/18630682634.pdfIn PDF document text
    • http://ximasoj.22web.org/diwapobekufej.pdfIn PDF document text
    • https://vosasavowaje.weebly.com/uploads/1/3/4/5/134587316/bugatewepim.pdfIn PDF document text
    • http://sitajejo.22web.org/vekuvaforosumex.pdfIn PDF document text
    • https://jizotigop.weebly.com/uploads/1/3/0/8/130874082/zolibegew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420760/normal_6018e3e14446f.pdfIn PDF document text
    • https://dupagerenukuxat.weebly.com/uploads/1/3/4/7/134751723/jimulenisutokex.pdfIn PDF document text
    • https://newimogo.weebly.com/uploads/1/3/1/0/131070302/5753195.pdfIn PDF document text
    • https://kumemuwopix.weebly.com/uploads/1/3/4/7/134709330/mufubozona.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_59521ad8930d4482bd21e3e2ef620227.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/garageband_ios_mp3_exportieren.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/34714529852.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/gegasuviwanusepipu.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/audiomack_cracked_apk.pdfIn PDF document text
    • http://mujunuge.rf.gd/vox_ac15hw1x_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/carrom_king_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/teacher_s_guide_grade_9_science.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/family_feud_google_slides_template.pdfIn PDF document text
    • http://baruluzibovog.epizy.com/varuvaguzivugi.pdfIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_006c091f34744ff2b14075e5a20167b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/15025050825.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/limufekotezeworo.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_off0000da9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9E 5440 bytes
SHA-256: 4b51ccf85d899abedae89af443028348baabe995be6de766d10e2d2ec8f79094
font_01_sfnt_off0000ed1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1C 10264 bytes
SHA-256: fae4af8b8f897598870d194fecd31d655f61d932a048d6041c93781b46b1def9

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