Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f3a9208e0619bb1…

MALICIOUS

PDF

76.9 KB Created: 2021-04-01 17:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0f198a328aeaf72f3c7e25eb8caef8ce SHA-1: 22a2c049b57f38bfe5dbbd600389711afede0f1b SHA-256: 4f3a9208e0619bb1410ab43325c2d983800367c0be94cafd74a1e028c5d7c34e
146 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to redirect users to malicious sites for phishing or malware distribution. The PRC/3D content heuristic also suggests potential exploitation vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/strik?utm_term=training+schedule+for+half+ironman+beginner PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390661/normal_600aaa6f5275d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371014/normal_5fe084a79056f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_6057dd9897f27.pdfIn PDF document text
    • http://pijitirade.iblogger.org/checklist_template_creator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_604a293c83ab2.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/53128067929cqtb4.pdfIn PDF document text
    • http://rm-swis-mine.com/96486381803or82v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412573/normal_5fc96d2b2a795.pdfIn PDF document text
    • http://service-hire.com/birijanisori6m8pm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450036/normal_6030990b6985e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484358/normal_5ff78301483ab.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/attack_on_titan_aesthetic_wallpaper_desktoplb0ga.pdfIn PDF document text
    • http://life50it.pro/samsung_bd-f5700_resetlxw61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buviwama.epizy.com/catcher_in_the_rye_chapter_summary_15.pdfIn PDF document text
    • http://zifovuruwe.rf.gd/atoms_and_molecules_class_9_cbse.pdfIn PDF document text
    • http://faguvepeme.rf.gd/mifumimixevonuker.pdfIn PDF document text
    • http://limirosu.rf.gd/solving_equations_with_variables_on_both_sides_kuta.pdfIn PDF document text
    • http://subugemorikeg.rf.gd/63882000092.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_off0000f05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05D 5524 bytes
SHA-256: b326d6a38a5237550d020cdd89210751caa9681fe04a8f1c7a4b0cdcc8c2353d
font_01_sfnt_off000102f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F9 10592 bytes
SHA-256: 94d0e9d9f8b4974ae255f6ed213ee916e2e8fae182a57c1f010e1767cb2027fc

Open this report in the interactive analyzer, or submit your own file for analysis.