Malicious PDF — malware analysis report

Static analysis result for SHA-256 a212cbba60b0d195…

MALICIOUS

PDF

71.8 KB Created: 2020-11-20 16:55:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3f0aebb07737f3ae55b1e6ea8a17c52a SHA-1: d8a0fba4d941fb6b66d3cc3cbb69d56d6532474e SHA-256: a212cbba60b0d195ce800559241159afc0140e749c940d2a5befcb05ed154fb7
156 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. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffnew.ru/123?utm_term=classical+conditioning+online+activity PDF link annotation
    • https://gozarijaleb.weebly.com/uploads/1/3/4/3/134337750/ponenikemabu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_5fafd2aca6dcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470967/normal_5fb2ca18c7816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_5fa56f94821d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/43f9561e-4963-46a9-a690-0afeafec7fbe/14007173473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c297d1-caf1-41dd-850d-1c36ee4a86d5/super_fighters_unblocked_games_77.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/84865183236.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/riolu_evolution_level_pokemon_glazed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06fef024-b247-4e08-bc76-f2f9a57c37d4/100k_coins_profile._dat_file.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/89326768075.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/dowesa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF87 4984 bytes
SHA-256: bf43386fd7ea8864e9d825dfea3274f0231dadaac8e21b49eb3ea180034a2d3a
font_01_sfnt_off0000e093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE093 10516 bytes
SHA-256: 0c6c4d3f849b0cc6da808aedd1be6a1af2d223d9899e4a0923953a9d09cc31b0
font_02_sfnt_off0001046e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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