Malicious PDF — malware analysis report

Static analysis result for SHA-256 34605cc48f7bb045…

MALICIOUS

PDF

66.9 KB Created: 2020-12-01 03:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e4e5fc49b9bc4e28ad4cf5c9fedccd9d SHA-1: dce911ba62c943aee2acf91e369cda05af6cfaa4 SHA-256: 34605cc48f7bb045dd0738b88448c5672d7ab4bcab8e551f55375d9c5441a290
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content.

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://trafffi.ru/123?utm_term=the+insanity+of+mary+girard+monologue PDF link annotation
    • https://getugegifajit.weebly.com/uploads/1/3/4/4/134481189/jijovimi.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/8147096.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/b9185f66-7e0d-41e9-af7b-8cf3ad3909cc/nubunovenekefimikufubapa.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/activity_1.1.2_simple_machines_practice_problems_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/lanowilovuviwib/witajaved.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/muvusavedabekego.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe57e14f98375720aee642/1606309857686/zijukaxopexixugebeb.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/pofovobiwopulawalis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd148f47f0db06af829512/1606227088312/spirituality_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd9cfeb-e162-41cc-9e6d-a4a6dd5583da/56366032315.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf56f93c6ccf69f3556966/1606375165923/bezetud.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/belitovefuwemuduju.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_off0000c944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC944 5372 bytes
SHA-256: bcf34cfb197ef244a2274683144a7823a4b63e920af83c6d060f4372ccd90d0b
font_01_sfnt_off0000db66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB66 10492 bytes
SHA-256: 91941d4ed838ecc758e5722f925eeb0e0724851b0287f78ad178e9239112ca1c

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