Malicious PDF — malware analysis report

Static analysis result for SHA-256 657ccd55593d32bb…

MALICIOUS

PDF

68.1 KB Created: 2020-12-17 19:35:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9349957ce1aa4b7ff98857c8fad095f1 SHA-1: 0dcf04e7e9004ec6f46e7c3ef1bb59a4060095fd SHA-256: 657ccd55593d32bb65b7c6ceacf476db76d2b052adbe2bfb1212d257be763b77
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier, exhibiting characteristics of a callback phishing or tech-support scam. It contains numerous external links, with one pointing to 'https://trafficel.ru/strik?utm_term=kenmore+he3+washer+parts+list', suggesting it may be part of a link farm or redirect chain. The heuristic 'SE_CALLBACK_LURE' strongly indicates the document's intent to trick users into calling a fraudulent number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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/strik?utm_term=kenmore+he3+washer+parts+list PDF link annotation
    • https://xikalevu.weebly.com/uploads/1/3/4/3/134319979/8304361.pdfIn PDF document text
    • https://lebidupevi.weebly.com/uploads/1/3/4/3/134319251/98804d3cacd.pdfIn PDF document text
    • https://sixojatem.weebly.com/uploads/1/3/4/6/134650300/dilosodaloz_detivujo.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/83d643a370.pdfIn PDF document text
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/vefonidipapud_wakuvo_golipo.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/putatalesozu-kisilowaxuzalud-gojibobanakulej.pdfIn PDF document text
    • https://pafuwaron.weebly.com/uploads/1/3/4/3/134385690/9468580.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/5fbce344be7cfc36344e8aaf/t/5fbf67469ee0f32b874bf7a0/1606379335698/30900498963.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfcd6f403f5353fd8f68b6/t/5fce645d74a40730fbcd0ee1/1607361630257/falling_down_lil_peep_clean.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfd363f75b166439b3f6e/1606286647632/7804547794.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c2dc1452f90b7ff143cf/t/5fc7231bb7521d608a3fc49e/1606886171674/dolonafuwogawetexem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89174da2-5a05-46bf-a0ef-c5b373e8d2a2/aquasource_shower_valve_temperature.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5355c24b06a7eb31bb18b/t/5fd61c7b89566e781f46f96c/1607867515793/notixadumol.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_off0000cd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD72 5284 bytes
SHA-256: 7ce0136c5dac104d7e5b25ba0cb68b00d44508a38697bccdd1883c6513e7e4c3
font_01_sfnt_off0000df59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF59 10576 bytes
SHA-256: 9fd0f0086bc9a82cf42ba0a1b3095b59572aa844ed54c14e46e628dc84f30ed2

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