Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7340371be6d2dc3…

MALICIOUS

PDF

64.8 KB Created: 2020-12-26 19:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 29702201a7f2b4c1627bbb71c12aeab8 SHA-1: e4a9b7353f826f59c92568352eaebddefc921a60 SHA-256: c7340371be6d2dc314a15b8846d349bc895a8e279b91ca8ec3c5ec77fbd559e4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to 'https://trafficel.ru/123?utm_term=28+x+80+exterior+door', which is likely a phishing or malware distribution link. The document body contains garbled text, suggesting it's not intended for direct user consumption but rather to host the malicious URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=28+x+80+exterior+door PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411915/normal_5fe43c2c6944e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447107/normal_5fa1823a483e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455883/normal_5fc9afa17cae7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452595/normal_5fba94292f895.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/jakujakula/teddy_bear_hamster_pics.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/soundabout_pro_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/51590096034.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/former_chairman_of_african_union.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/allianz_visitor_health_insurance_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/sql_server_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/49475309659.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/gesimogugi.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/6524427921.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/equifax_credit_report_confirmation_number.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/12301691417.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/smile_recharge_app.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_off0000c34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC34D 4840 bytes
SHA-256: 1111c0ad5f5bafa3f5641deeedbdfd46b62b103e271550027483fe14ad4fe7ff
font_01_sfnt_off0000d3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D3 10216 bytes
SHA-256: 9d58e709b37fc29d1164ea0a0bd868dfcd18ac899c4457cceffbf73b24b7675d

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