Malicious PDF — malware analysis report

Static analysis result for SHA-256 398ef56b1abc5d76…

MALICIOUS

PDF

98.5 KB Created: 2021-02-16 09:45:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2ae79a9cbbaf5d3f3316e85fe40723a8 SHA-1: 66ca046f2e2916a9a11b2bbd26008f35ef34639c SHA-256: 398ef56b1abc5d769a4fcdf46cde0475873dddef2365b980dd58f68388ca187c
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous external links, including one to 'jottigo.ru', suggesting an attempt to redirect users to potentially harmful content. The PDF structure and embedded links indicate a tactic to disguise malicious intent behind a seemingly innocuous document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=ny+driver%2527s+manual+in+arabic PDF link annotation
    • http://finansi-7.online/redasajakijongavl1.pdfIn PDF document text
    • https://cdn.sqhk.co/sadopore/gcijsev/bubbles_cannon_hile.pdfIn PDF document text
    • https://bodarisijusafu.weebly.com/uploads/1/3/5/3/135383154/supitosopelite.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/igj8hhF/monster_truck_show_nashville_tn.pdfIn PDF document text
    • http://immortal-sho.club/40178427715d74er.pdfIn PDF document text
    • https://cdn.sqhk.co/vuritukupus/cghnfgl/41336532091.pdfIn PDF document text
    • http://how2clever.com/54907956000ylull.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/S1jhHha/94101707907.pdfIn PDF document text
    • http://zovanatul.iblogger.org/blacklight_retribution_official_site.pdfIn PDF document text
    • http://shoop-fk.ru/79764609313yp4em.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pokupila.rf.gd/comprehensive_report_about_drug_tik.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/65325993527.pdfIn PDF document text
    • http://revilika.epizy.com/zugamep.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/62125606595.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/38060627976.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/hydraulic_fluid_msds_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/neruvokil.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_off00014414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14414 5388 bytes
SHA-256: d94f4d4e05b1e0b95225767fca3ba790a4b007d4568f538ec638b6ce9facbe23
font_01_sfnt_off00015669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15669 11400 bytes
SHA-256: 18a48160164121fff97c42e0430a35cfaba7d8e7f3eca364613603171c273d78

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