Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d834be3ab41a6e…

MALICIOUS

PDF

63.9 KB Created: 2020-12-25 18:19:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 491a9ae804e5e29f1057b85cec7f6f38 SHA-1: 611f57be6ad174e3b7b9d9d45360fb1c48857b00 SHA-256: 59d834be3ab41a6e2360497526548b4ad80f2f089c04a0332ee27c4689087440
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. One of the primary links directs to 'traffking.ru', a known malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/strik?utm_term=target+colsie+tie+dye+sweatpants In PDF document text
    • https://cdn.sqhk.co/guletema/SjjhVia/comic_blood_link.pdfIn PDF document text
    • https://cdn.sqhk.co/bakavaxa/Nwgehbo/song_hope_you_dance_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462354/normal_5fad45a34aa0f.pdfIn PDF document text
    • https://xurizuful.weebly.com/uploads/1/3/4/8/134898541/risit-kitodoxuritib-zerod.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://uploads.strikinglycdn.com/files/da92c8aa-2681-410f-ae71-bd93670c52f6/carretilla_manual_hidraulica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bfad872-71fa-41a2-a3c0-84be96eadc0e/drum_kits_for_sale_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d019d7d7-f1fc-429f-bda4-dd153b15b078/kunetefolurugi.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/tagelus_ta60d_sand_filter_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8843f2c5-b9dd-454e-8629-0d427d5649b4/hands-_on_artificial_intelligence_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/delonghi_air_conditioner_symbols.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_off0000b32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB32A 5172 bytes
SHA-256: 1c9d462ca6e473d41cf665c5b956cb8a37db82da65b8ce6d8d51ac859f841859
font_01_sfnt_off0000c4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E0 9408 bytes
SHA-256: f0b253530714d2b0e3cd80a42122411d5354851b7f3df857699e3f822ebb5d9c
font_02_sfnt_off0000e502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE502 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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