Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aed9bf2b4ac996e…

MALICIOUS

PDF

66.1 KB Created: 2020-11-24 02:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9547b027fdc46303e559c1bd760a3cef SHA-1: 7e65177636a0fe1555c0fa9aece4ad34c8dec0a1 SHA-256: 4aed9bf2b4ac996e2dda05204a0aad29238f6675c447dd812f186f37ffefaf1a
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URLs is https://trafficel.ru/strik?utm_term=paco+ignacio+taibo+pancho+villa+pdf, and another linked PDF is https://vebavorosufate.weebly.com/uploads/1/3/4/7/134742301/lonobubuxadized_lepisuvado_tedapere.pdf. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/strik?utm_term=paco+ignacio+taibo+pancho+villa+pdf
    • https://vebavorosufate.weebly.com/uploads/1/3/4/7/134742301/lonobubuxadized_lepisuvado_tedapere.pdf
    • https://kobizixudowizeb.weebly.com/uploads/1/3/4/4/134402546/d702af0.pdf
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/riburu.pdf
    • https://ruwalabipuges.weebly.com/uploads/1/3/4/4/134465281/gapas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/ladiwuzetawedi/coffee_day_enterprises_ltd_annual_report_2018.pdf
    • https://uploads.strikinglycdn.com/files/d8d6d8cf-6fbd-42b6-86f7-02c31b31d139/sanewetasoduvofu.pdf
    • https://uploads.strikinglycdn.com/files/57b8bea4-9ee0-40fb-811d-0776f88b5357/the_british_beehive.pdf
    • https://s3.amazonaws.com/xanebavifamopez/mevorese.pdf
    • https://uploads.strikinglycdn.com/files/e018b2e2-74f0-4971-a521-7c258409e147/5777616685.pdf
    • https://uploads.strikinglycdn.com/files/51458831-e969-43df-9c93-070a36edf43e/jabariya_jodi_full_movie_free_openload.pdf
    • https://s3.amazonaws.com/tamobalasu/cell_size_answer_key.pdf
    • https://s3.amazonaws.com/vasagesorajirem/carrera_de_relevos.pdf
    • https://uploads.strikinglycdn.com/files/6ba6c1d0-2946-4805-88ba-64da9f86dca0/ernest_hemingway_a_moveable_feast.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5d2.bin
bef961038edf7f948cc4b8b2f1e281a922e7e2cf91d67ca020c8d5ef81f6bbe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5D2 5012 bytes
font_01_sfnt_off0000c6d5.bin
b58aae98d02384eb6051c8dc3f6607e0f1da949e69481ca39fdb6fed0049be8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D5 11248 bytes
font_02_sfnt_off0000ebe3.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE3 4324 bytes

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