Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be012f8758c06c0…

MALICIOUS

PDF

72.9 KB Created: 2020-12-26 01:14:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ae17d61c76ebc297d104007bf1e6c219 SHA-1: bc58eab921dac07d2beff64175dc1d67cd717e96 SHA-256: 0be012f8758c06c01d7047f4ed0d37b7967ef2c7eb54a8e4b493091929ee328f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'trafftec.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are benign, but the presence of a suspicious URL and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest malicious intent. No scripts were extracted, but the PDF structure itself is indicative of a link farm used for malicious purposes.

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://trafftec.ru/123?utm_term=that+sugar+guide+book PDF link annotation
    • https://cdn.sqhk.co/xinovupu/hbapgdS/thai_learn_english_online_free.pdfIn PDF document text
    • https://xukolewijox.weebly.com/uploads/1/3/4/3/134320036/bisokowurax.pdfIn PDF document text
    • https://cdn.sqhk.co/rowavarop/FVgg4Dc/custom_stickers_cheap_canada.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/sefiwegegagu/cause_and_effect_worksheets_for_2nd_graders.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/fall_foliage_report_2019_michigan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad2c9ed-25b8-465f-800d-69ec006cd4c6/kudakatox.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/zotaganazadapivevuvizopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35034c9a-1760-4606-bc19-4a5fd9b57e08/rock_and_mineral_field_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/pevaxipufokovol.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/mount_and_blade_acok_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/kasinot.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/brevet_collges_report.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_off0000e0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DB 5208 bytes
SHA-256: e86594ec3c58b20c4fb82ab5e2047aaaaf8a34ff4a898b6fe3a1ce44315a7a1b
font_01_sfnt_off0000f28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28B 10888 bytes
SHA-256: e0aaba241046fe7632d01a000449de6e1f7f2c1e788fca36ec36d58b508325b9

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