Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bc5cfb6a098e3d…

MALICIOUS

PDF

76.0 KB Created: 2021-01-16 01:07:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f9c6112100299ad2556b1452a93b4596 SHA-1: 9745a45b1283d86eb0d3cc74a513f0d3234a7bd3 SHA-256: 97bc5cfb6a098e3d374f6cfc328ccd5b780ad24e80246b30e6f866156a362c92
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains a large number of external links, with one pointing to 'traffnew.ru', suggesting a phishing or SEO spam campaign. Although no scripts were explicitly extracted, the PDF structure and the presence of numerous external links are indicative of malicious activity.

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=7+things+lyrics+and+chords PDF link annotation
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/ff995a3666.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/losimavuteza_fobuzalejaken_guvijanadude.pdfIn PDF document text
    • https://cdn.sqhk.co/suxugipajepo/jghgggh/94362666635.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/AggjjeW/tagutosixusiba.pdfIn PDF document text
    • https://febotagi.weebly.com/uploads/1/3/4/7/134728548/zanowu_xuriduweni.pdfIn PDF document text
    • https://natufebopod.weebly.com/uploads/1/3/4/3/134305275/sufuruz-geduzejorak.pdfIn PDF document text
    • https://tikobivit.weebly.com/uploads/1/3/1/3/131382680/0c34b8fa7288.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://s3.amazonaws.com/gezetega/bb_app_world_link.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/minna_no_nihongo_fukushuu_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/babu_bangaram_movie_movierulz.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_off0000df6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6B 4960 bytes
SHA-256: 1b11a0b6afc53d572ad9fe42d8fcdfcd77f402f60e00d54dccc7163601592536
font_01_sfnt_off0000f035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF035 11092 bytes
SHA-256: c19d35b9fe082bcbac91d13b515fa3810edc3141fa1be118a2009e93044e3f6b
font_02_sfnt_off00011562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11562 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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