Malicious PDF — malware analysis report

Static analysis result for SHA-256 389f2285ef353629…

MALICIOUS

PDF

69.3 KB Created: 2020-12-18 07:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bba3034e41667fd1a3f767ce2c53d614 SHA-1: dd94a5db4c5801591b5bb43913d1932f151d4f35 SHA-256: 389f2285ef3536293e9d618c43ab729a01009e055cd3c75b61671dfc61f3bedc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?utm_term=the+wonder+years+season+5+episode+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412151/normal_5fc3fcd115f9f.pdfIn PDF document text
    • https://fijoxivivuf.weebly.com/uploads/1/3/4/0/134041864/3380990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486535/normal_5fd646f80a5e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5f937c134f801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408172/normal_5fdaab099e709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491159/normal_5fab190c4a9e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/sy0_501_study_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc550135bcb0228a29fc239/t/5fd64457acac596b0cb5eea7/1607877719325/free_chronogram_template.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/jijodikamij.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/carpenters_tools_dnd_5e.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1965e5e8e827d4292b594/t/5fc88ae8ee804a17a1d46ec7/1606978281105/hero_brave_battle_of_dragon_mod.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5067bc819f1cf4cf1de6/1606373483590/ld_topic_2020_march_april_2020_calendar.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b590c30a162e0c73766b/t/5fc94744c8277124b15ef376/1607026501393/tumibenurejib.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_off0000cf7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7E 5456 bytes
SHA-256: ac6babaee6b1073e9b8871a01efc7cfd11909aead51db23c5bdde29573198b04
font_01_sfnt_off0000e21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21E 11432 bytes
SHA-256: 0b3efa2251b0223a58ad0f3eaa35b491e4f74d8346a311f68fbe697e295542ca

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