Malicious PDF — malware analysis report

Static analysis result for SHA-256 af589609b3319a77…

MALICIOUS

PDF

73.7 KB Created: 2021-03-03 05:30:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dd7d6409b6c5f71d5c6eef27f6e53392 SHA-1: 4c6404cb8a173d141e38d3d528fec51700f10b42 SHA-256: af589609b3319a77cb55c4a5578d0196ac151e6d0b7576a2089f1a914bdfa55a
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 a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a large number of external links, many pointing to Weebly and other file-sharing services, suggests a link farm or phishing attempt. The document body, though heavily obfuscated, contains keywords related to legal topics, potentially used as lures. No scripts were extracted, but the PDF structure itself is being leveraged for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/wb?keyword=how%20to%20stop%20parental%20alienation%20in%20texas PDF link annotation
    • https://vesokawewewavi.weebly.com/uploads/1/3/1/3/131382886/6952900.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/ha48yja/instories_insta_story_collage_maker_edit_videos.pdfIn PDF document text
    • https://zaxonoso.weebly.com/uploads/1/3/1/3/131381259/2975829.pdfIn PDF document text
    • https://kaposabebozof.weebly.com/uploads/1/3/4/4/134466843/6780680.pdfIn PDF document text
    • https://berizekaxijaj.weebly.com/uploads/1/3/4/5/134501449/juxodajafon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446512/normal_60329fb2c42a9.pdfIn PDF document text
    • https://cdn.sqhk.co/matikefateri/giijcUT/nokubuwefemojinokalo.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/ghfvjgw/becoming_a_teacher_in_new_york_city.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/18369523879.pdfIn PDF document text
    • http://esportzmlevent.com/ruvemuxixobinujonoud5v4.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/kukazowox/film_anaconda_kalimantan.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/whirlpool_washer_and_dryer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/gekovijepodo.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/17154350679.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_off0000e47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 4932 bytes
SHA-256: b16e83612debe7463ccfa2d5a22a4458ca24584aefdf5d29d866595a2c5ff295
font_01_sfnt_off0000f560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF560 10784 bytes
SHA-256: c825e33d73024f33ef019c6a87d6c2ef22bacd3c57f18c26c8499fff378c31bf

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