Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4b20666cbb2aeb…

MALICIOUS

PDF

72.2 KB Created: 2020-11-25 00:51:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a084bcbf843d3e389e39f43460b8ab88 SHA-1: d355e1eec0f6f39f49d21706606221b0f6c707f8 SHA-256: 9f4b20666cbb2aeb8b70e427199f618822abaacfb08fd818256ba9695c8b79b7
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URL pointing to 'https://trafficel.ru/123?utm_term=cassandra+espiritual+punto+puntos', which is likely used to redirect the user to a malicious site. No scripts were extracted, but the presence of the malicious URL and the detection signatures indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=cassandra+espiritual+punto+puntos
    • https://cdn-cms.f-static.net/uploads/4369912/normal_5f911bfe872f1.pdf
    • https://cdn-cms.f-static.net/uploads/4498997/normal_5faede4a0847c.pdf
    • https://cdn-cms.f-static.net/uploads/4463533/normal_5fa6174207087.pdf
    • https://cdn-cms.f-static.net/uploads/4461525/normal_5fab69dc05271.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a70db5dd-f468-4e63-a2f7-2b729db02718/chapter_13_genetic_engineering_answer_key.pdf
    • https://s3.amazonaws.com/nafibanefexex/us_army_jumpmaster_nomenclature_study_guide.pdf
    • https://s3.amazonaws.com/jadudusujuje/2016_prius_manual.pdf
    • https://uploads.strikinglycdn.com/files/42c0b83d-9e3f-4a92-9f2a-070a650fe1a8/66216718100.pdf
    • https://s3.amazonaws.com/jufowokedunod/long_walk_to_water_hyperdoc.pdf
    • https://uploads.strikinglycdn.com/files/7803caf3-126e-4b2f-9404-5c9530925ed8/metodos_de_interpretacion_juridica.pdf
    • https://s3.amazonaws.com/mipeboro/gutamojafuk.pdf
    • https://uploads.strikinglycdn.com/files/d87f0041-5948-4384-bf67-c8c7210a8c0d/78216467987.pdf
    • https://uploads.strikinglycdn.com/files/6802bead-c1b6-4911-bf6c-4604db1b4635/59273667094.pdf
    • https://s3.amazonaws.com/faluzotixupi/planets_in_order_of_size_largest_to_smallest.pdf
    • https://uploads.strikinglycdn.com/files/fb26ec99-8a41-4dec-876c-45281d9aa96d/59986854136.pdf
    • https://s3.amazonaws.com/pulavokaxe/46297409461.pdf
    • https://uploads.strikinglycdn.com/files/37ac8474-d386-466b-82b6-df7675c19cd4/54029618860.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db62.bin
b3939324488290e1f153d6bf7d7dadc0abf8b26874205529631dd82061e6c2b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB62 4856 bytes
font_01_sfnt_off0000ebed.bin
98450f6d0414aab8f2795ce2b2d30f13d892ba19beeb4eecbaba7501e4badf77
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBED 11900 bytes