Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaad1ba9e69c09f8…

MALICIOUS

PDF

69.0 KB Created: 2020-11-18 00:50:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 37f813c6c2f0cc2feff5e0ea602cf4ff SHA-1: b6bae2699153962d3707b57fb74a8e7f2e5039b3 SHA-256: aaad1ba9e69c09f8ee08422fbc518b68bfe5ba1c57e0965fd24b6b1f6e4e6e5f
132 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, specifically mentioning inmate commissary services and urgency. It embeds a suspicious URL, 'https://trafffi.ru/123?utm_term=touchpay.net+inmate+commissary', which is likely the primary malicious payload delivery mechanism. Although no scripts were directly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely involving a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=touchpay.net+inmate+commissary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5f956dbc39ace.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_5f976044bdcea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_5fb0008db5ad2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tonisefoteka/how_to_write_an_overdue_invoice_letter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b17c801f-bd07-4ca7-a140-0fc8ddce3fdb/no_mans_sky_atmosphere_harvester.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/44507976185.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/detala.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/xozodaxatapevexumub.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/64654125823.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/gm_flex_fuel_sensor_wiring.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/the_cell_cycle_worksheet_matching_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/district_60_school_calendar_pueblo_colorado.pdfIn PDF document text
    • https://s3.amazonaws.com/vezosoluvezoj/4998100297.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC349 5108 bytes
SHA-256: 379272adfae2b4cad38046cd712ba88c05969757d6d7254f047852966c3aeeb1
font_01_sfnt_off0000d47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47C 10844 bytes
SHA-256: 079ed942fa18693e4d2bf4316bad46a25e47185ab0427c3cf773d582ce62eb63
font_02_sfnt_off0000f92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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