Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e01425ff0e033c…

MALICIOUS

PDF

71.3 KB Created: 2021-06-10 14:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d8fa7c6b40207b7e1e475f51ef64381a SHA-1: 0dd5a0d736ff6f6ad09bc841bca6374b476935e6 SHA-256: 15e01425ff0e033c739f5dc5ceedd6cc4dcedc4f83d62a4df324ea892ee6c594
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/pbw?utm_term=best+free+motorcycle+games PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388422/normal_604f4cb0d2986.pdfIn PDF document text
    • https://logozirajukafod.weebly.com/uploads/1/3/4/8/134848231/4b78335f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471240/normal_60247ce80a1b7.pdfIn PDF document text
    • https://gamupizesusaza.weebly.com/uploads/1/3/1/3/131398140/17079e7feb943c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487625/normal_5fe1a519a90d7.pdfIn PDF document text
    • https://nabisipiguges.weebly.com/uploads/1/3/4/4/134432296/ranamaw-kalalapaxusupes-nosuwutaluxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_605b5e715f7af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486963/normal_60306e107b477.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390052/normal_600520cd556c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408476/normal_602977bb8ce75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471692/normal_602f4313f3f87.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4384035/normal_60b1e8f63fcdc.pdfIn PDF document text
    • https://lufakonu.weebly.com/uploads/1/3/4/7/134711707/7394765.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/03aca8d5-3ae9-4f38-a1d0-fa2347fc0fdb/adrenal_reset_diet_meal_plan.pdfIn PDF document text
    • http://ragasegena.pbworks.com/f/mr_peabody_and_sherman_full_movie_in_hindi_online.pdfIn PDF document text
    • http://bezawagiga.pbworks.com/w/file/fetch/144554838/images_for_whatsapp_dp_hd_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3b7dd98-2a01-40c4-9af6-45509d073ee7/kidde_fire_alarm_double_beep.pdfIn PDF document text
    • http://kafunujazuwo.pbworks.com/w/file/fetch/144525957/psc_bulletin_diamond_jubilee.pdfIn PDF document text
    • http://jojekepodef.pbworks.com/f/kitiwiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ab8719-2676-4375-a8ff-8b333dfe24e8/rupegirilutunusipevevag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e6a3465-eddd-400a-aa9e-b42f0a9e3c6d/588399763.pdfIn PDF document text
    • http://pewexojazo.pbworks.com/f/58460677168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/144a2eea-8b5e-4d77-997a-ee372ffa180c/5985656682.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_off0000d9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BF 5352 bytes
SHA-256: 128e6e9241345a49ca196e5200173c491816ece386fdd4bc72094d657a0e1985
font_01_sfnt_off0000ebee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEE 10000 bytes
SHA-256: 76656e4d94e3cd46bebb92bf137387c5de9538b826bfcd7cf915aa0c81127806

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