Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b350b3b2bf342d…

MALICIOUS

PDF

72.9 KB Created: 2020-11-28 08:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 19cc4ccea9a379cad18715d4545ab53c SHA-1: dfe00c997657adace5f286352611d165f342109d SHA-256: 40b350b3b2bf342d42f1b0691dbd905c8a4ac32e0447ace4a4c7306f26ce566c
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=pacific+hydrostar+pressure+washer+98444+manual'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, one of which is 'https://uploads.strikinglycdn.com/files/e2bcc405-253a-49f4-9f19-cb7047d59c33/tekum.pdf'. The ClamAV detection and ML classifier further support its malicious nature, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=pacific+hydrostar+pressure+washer+98444+manual In PDF document text
    • https://duveniwapawas.weebly.com/uploads/1/3/4/2/134265961/magogefek-rulopo-kuniz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2bcc405-253a-49f4-9f19-cb7047d59c33/tekum.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/antecedentes_de_la_diabetes_en_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f286559-010f-4311-9636-7f4469fe60e6/29366311145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c72b21-7abd-4a48-ba6e-0ff2a10be602/fatgum_my_hero_academia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de8b0dc5-df69-42b5-89fa-bedadd3d8644/1984_reading_guide_questions_and_ans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7931692d-0a0c-48db-93d8-e7651427e1b5/actex_pa_study_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3f66b2-fa19-494a-bffc-19b8dce53d26/48634867310.pdfIn PDF document text
    • https://s3.amazonaws.com/gebaxovudofe/guide_to_glorantha.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/hi-_q_buna_dimineata_te_iubesc.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_off0000deb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB7 6028 bytes
SHA-256: 62c1f28bfa59db92a4b50b73093778ff09f495c44f8b6e2ba2ad9add9a48d29a
font_01_sfnt_off0000f337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF337 10336 bytes
SHA-256: 616c8220cc13a2b7c14a9de473cf77ad3e098f03659c6e7111c3402512cc417d

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