Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f97a143b36a1d18…

MALICIOUS

PDF

77.3 KB Created: 2021-02-19 04:23:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 14b61610f39493cfdd88924b2329fb14 SHA-1: fdc709dcc63d2e469c60670cbe43433dd6b4e251 SHA-256: 7f97a143b36a1d188c57b3ce58a48f7691c412856f34334e399f6769c2c0ba43
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO farms or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the primary goal is to drive traffic to potentially malicious or deceptive content, masquerading as a document about dash cams.

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
  • 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://baarspo.ru/wix?keyword=z-edge+dash+cam+front+and+rear PDF link annotation
    • https://bixevojug.weebly.com/uploads/1/3/0/7/130739122/9fc6de3da.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/7203213.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/z7gijha/como_combatir_la_virosis_en_el_tomate.pdfIn PDF document text
    • https://cdn.sqhk.co/lewemimi/icEhgha/10171804322.pdfIn PDF document text
    • https://xonedapu.weebly.com/uploads/1/3/4/6/134654428/vetaruwuviwo.pdfIn PDF document text
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/rupiwusexupariv.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/jjidiaj/50985684591.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/vonuxagupeduze/spektrum_dx7se_review.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/19647586621.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/bcdedit_set_default_useplatformclock_true.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/bird_box_movie_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/87485422100.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/32018272520.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/engranajes_de_tornillo_sin_fin.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/me_ashya_rangachi_marathi_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/30576615932.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/hypertensive_urgency_and_emergency_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/saudi_arabia_business_visa_application_form_australia.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_off0000f2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D8 5392 bytes
SHA-256: 4c3e5e677e78d1a02471b9ba8e43debaa17d32c0558524e23eb480e13ba813d2
font_01_sfnt_off00010510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10510 10136 bytes
SHA-256: 1b855a9da0d8318644f3cdfc98dbc140f0035ba2d926b97e3a2f5b1ec4cce4d3

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