Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb6b52683157812…

MALICIOUS

PDF

68.4 KB Created: 2020-11-17 19:17:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7dce3064d256bb31f16880109ea62cb3 SHA-1: 1cd58fe293e91aa1273059fc2c947660e82668fc SHA-256: fdb6b52683157812790afd631cbab34e49fa92409e57cede336bd234988d30c1
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that points to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of the external URI and the overall detection indicate a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://traffset.ru/123?utm_term=skyrim+character+builds+necromancer PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/165da2a1-0b5b-4747-867f-a0c1c35bd345/40433114668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/048459ae-a108-492d-a896-06bd63f43fb3/lg_bp125_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6d42e7-96d2-428c-8f2b-40c79690d967/1._what_is_the_price_elasticity_of_demand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77510c47-1e90-49ae-b935-04434aad512e/86017014132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3eb69e1-c97d-4728-bead-448dc54a05fe/postal_2_engine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75136cdd-9e5b-4c36-80ca-d59291f588bf/fruit_from_a_poisonous_tree.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/064d4a2a-c9c9-4c86-9e2d-7729004d316a/ponujekubavenotafewogi.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/33027960914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b114d02b-9744-4426-952a-82707d9deda2/26495348399.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/nibofenamemiwuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1d9a270-8749-47bb-8ca5-2f1425613d28/notas_de_flauta_transversal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/769a07ee-9030-4cec-9771-c2ad1b4a5593/fosiworerarerafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0890638f-b656-40a0-aaa9-c710bedb6c65/5903636257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f584631-9adf-4ca3-bba4-69358e7e7721/xifezomepaviwamotibiras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03291a11-a445-4b31-b1ed-e76836232068/98999475002.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_off0000ce8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8F 5588 bytes
SHA-256: 6ac5d2328192e072aa65461ac55bc661902b60da7b51b42d3d66f92e5d4d8a76
font_01_sfnt_off0000e164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE164 10340 bytes
SHA-256: b957683963be7e9e9ebf96f6acc38f4c5c69efa0eeb6279d9bea5a1dc705d957

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