Malicious PDF — malware analysis report

Static analysis result for SHA-256 1050d8415c85ca86…

MALICIOUS

PDF

80.2 KB Created: 2020-11-18 06:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 617073b2541fadbd74927fc39ac6b439 SHA-1: ecd61859e39cf5a421038e86bb57f96fda4b82fc SHA-256: 1050d8415c85ca86100b3a230fadabe62a58503fa9cf33a9302a0b0e3965a92a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. It contains a large number of external links, with one pointing to 'trafffi.ru', suggesting a phishing or SEO spam campaign. No scripts were extracted, but the presence of numerous external links indicates a likely attempt to redirect users to malicious sites.

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://trafffi.ru/aws?utm_term=simple+consulting+proposal+template
    • https://xepajozojiv.weebly.com/uploads/1/3/4/4/134476610/452816.pdf
    • https://pirovosarelivo.weebly.com/uploads/1/3/1/4/131406751/46ef37fd6a71fd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1a055776-a029-458b-b6b8-ff0c670bd623/2382289055.pdf
    • https://uploads.strikinglycdn.com/files/fe1ded3a-72b4-4e2f-97dd-7a908f7a9975/ouvir_amado_batista_no_palco_mp3.pdf
    • https://uploads.strikinglycdn.com/files/46071850-323a-4c89-8712-957fdc61c1f1/14009611391.pdf
    • https://s3.amazonaws.com/jaloto/wycallis_elementary_school_dallas_pa.pdf
    • https://s3.amazonaws.com/tobito/xujolobugus.pdf
    • https://uploads.strikinglycdn.com/files/0c2162ad-a01c-4565-b2ef-ee3187801743/47747870819.pdf
    • https://uploads.strikinglycdn.com/files/1a8ffab6-d185-4ee7-893b-a965a27a891e/42451934738.pdf
    • https://uploads.strikinglycdn.com/files/75c63611-c788-461e-bd48-8a0a487f4135/trailblazer_elementary_school_douglas_county.pdf
    • https://uploads.strikinglycdn.com/files/478d09e9-0102-4692-a720-aec5f77ab260/texas_age_of_consent_1990.pdf
    • https://uploads.strikinglycdn.com/files/f523fbef-c96a-40f9-8801-da050753dc13/zarap.pdf
    • https://uploads.strikinglycdn.com/files/b020e1a0-6c0b-410a-b3ec-fd1ed19ab866/hamilton_county_auditor_ohio_real_estate.pdf
    • https://uploads.strikinglycdn.com/files/9db873a5-6325-47be-93fd-44315053024a/pepuvokobudewufusapax.pdf
    • https://uploads.strikinglycdn.com/files/0d615a3d-845e-44cb-ba43-a590e15f3049/jukikizujeji.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_off0000fc45.bin
08246b6627cc1c346fe0cc7c42264a816934459ddc49a36396b3ad6fcfd94903		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC45 5356 bytes
font_01_sfnt_off00010e64.bin
d0d3dccd06fd68857f4c6ecdd0a086df293c046a63f921af22050e09d02428b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E64 10896 bytes

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