Malicious PDF — malware analysis report

Static analysis result for SHA-256 629f42dc518b427a…

MALICIOUS

PDF

72.2 KB Created: 2021-02-24 06:14:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0d76803bae4913269b2957861fc025db SHA-1: c27e4a32401c199696fc9e56d98d2477bfad59bc SHA-256: 629f42dc518b427a29e3d8852c75b7e147950cf0c71827a3bad0b1aa8d8ce4c3
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and likely phishing-related. It contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, appears to be related to search terms for grill replacement parts, indicating a lure to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=char+broil+performance+4+burner+gas+grill+replacement+parts PDF link annotation
    • https://cdn.sqhk.co/rularijulen/zjaihiJ/77078475151.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/ihgEhgz/rarafuporaxumel.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/bgcDhfB/ritefifawuveguvuf.pdfIn PDF document text
    • https://devigafaviv.weebly.com/uploads/1/3/4/6/134698058/posovipode-faxisixanape-kodidi-koziwinibibum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484995/normal_5fc6b3da581b6.pdfIn PDF document text
    • https://teriwogawuf.weebly.com/uploads/1/3/2/8/132815342/sakujibizapit-fogekuzaxekude-witabisomufoxej.pdfIn PDF document text
    • https://gazumewus.weebly.com/uploads/1/3/4/9/134901575/dolekevam-tazokof-xovotilinojik.pdfIn PDF document text
    • https://kajubuti.weebly.com/uploads/1/3/2/6/132680994/zatekiwenewaxovozodu.pdfIn PDF document text
    • http://dogolojowazovuf.iblogger.org/drunvalo_melchizedek_birth_of_a_new_humanity.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/hfBjiOd/zeus_overthrew_his_father_cronus.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/vixuwogetiv/brassard_bratley_fundamentals_of_algorithmics.pdfIn PDF document text
    • http://mupisogedosido.epizy.com/bsge_hysteroscopy_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/vikeviwifokopetuxevel.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/texisinu.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/83700945019.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/49146868885.pdfIn PDF document text
    • http://vabibago.rf.gd/sherlock_holmes_crimes_and_punishments_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/report_road_accident_singapore.pdfIn PDF document text
    • http://lojuwuwa.rf.gd/19998053349.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_off0000d804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD804 5560 bytes
SHA-256: 542945957dae2a163d5dc2394300f6e1b29dff583f1b0c6402b5ed32f13111ee
font_01_sfnt_off0000eaca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACA 11468 bytes
SHA-256: 83f1289075b655884e31dc6fca4d81afa24a8f09af11a4b8f33e1532b2f62e3e

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