Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cdcd5c17aae0701…

MALICIOUS

PDF

73.2 KB Created: 2020-12-01 13:18:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d9908da4aeead0f365224dd882d5d95f SHA-1: 95a1653b20876cd9f68b5711e74973b3e3501154 SHA-256: 1cdcd5c17aae07016d5a4591869e17e6cd03fcd51c3b23ea1ff8094a71cfa743
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a URL that mimics a search result for a specific product, likely intended to trick users into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. No scripts were extracted, but the embedded URI is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=android+phone+under+5000+4g PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471249/normal_5fb000a3bf936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422620/normal_5fbcb8fe2bbe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f8b061c0322f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380230/normal_5fbe3f8ac4d81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2fd6b97992eb55c026f/t/5fc1939a9ee0f32b878eb858/1606521755136/72126404739.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10afc403f5353fd968892/t/5fc260264f983757202caa28/1606574118263/tababarivemag.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eab716f6d44b07bedc8b/t/5fc14885e18c5c478e2b6692/1606502534326/11916047834.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe31e57acac6192a8b20e6/1606300134157/xudazi.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/exhaust_gas_recirculation_seminar_report.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd202e34a09a73faedd1d9/1606230065295/53639300372.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/55847037573.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/52272278401.pdfIn PDF document text
    • https://s3.amazonaws.com/giwurode/bass_pro_little_rock_ar_boats.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3f01e6d49a06bb5d191e/1606303491710/80047185440.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/8121805431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3968c86b-c236-49e9-b932-6e9e57b46682/54470715250.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_off0000e064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE064 5144 bytes
SHA-256: f84853bad3d2f64f607ad721dc0f7e077c36d967cb71cb568f817071a5c8e3ae
font_01_sfnt_off0000f1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EA 11272 bytes
SHA-256: b149069c7eb4405e87649073bd1c995e7d0a07aaad5c608465f5bede875a8bef

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