Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12b9fe90957ef26…

MALICIOUS

PDF

64.9 KB Created: 2020-11-18 17:09:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 94810506fa5886496ca77404db3ed601 SHA-1: b722b60c1889e4c55dda5a6c333719e94d3fae73 SHA-256: e12b9fe90957ef2601514b8b749bb7cb114e0fc24e8239ef560863ef1be04a10
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 by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing or tech-support scam pattern, where the document likely prompts the user to call a phone number. Although no scripts were explicitly extracted, the presence of numerous external links, including one to 'traffking.ru', suggests an attempt to redirect the user or download further malicious content. The document's structure and the high number of external links also triggered a 'PDF_SEO_LINK_FARM' alert, indicating a potential attempt to manipulate search engine results or host a large number of phishing pages.

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://traffking.ru/123?utm_term=usf+facts+unofficial+transcript PDF link annotation
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/2220687.pdfIn PDF document text
    • https://porujigiwafixuf.weebly.com/uploads/1/3/4/3/134373975/8287847.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/b172ff8ac831.pdfIn PDF document text
    • https://gamorajemusuro.weebly.com/uploads/1/3/4/3/134316050/938618.pdfIn PDF document text
    • https://zerexiborugixa.weebly.com/uploads/1/3/4/7/134705556/kumikupevak_likiveni_soxalila_tureribuwo.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/sazariwapa/6482719612.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/35770541501.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/spatial_processing_in_the_brain.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/dynamics_365_for_finance_and_operations_development_cookbook.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/15948971500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8bc2452-870b-46fe-b8bd-1981c7ac84a1/fundamentals_of_physics_9th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/eaton_chspt2ultra_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/xasegawunabo.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/abstract_algebra_textbook.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_off0000c0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D6 5000 bytes
SHA-256: 9fdd9500ec3b921cda361459d200f5f2694ba7b9595d082d5f28ed255f9a31e4
font_01_sfnt_off0000d1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EF 10844 bytes
SHA-256: 4962658ac44db1bd136836850163919d08ea965d4ce614902c952a439de2c2fb

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