Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5093429675a8c3…

MALICIOUS

PDF

72.4 KB Created: 2021-03-23 13:18:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be2d0417774f5218dfcad7d02138eedf SHA-1: 826820159772c37444ac08fb2be32e33113e816b SHA-256: de5093429675a8c3b0d7af7a41d008b2291a415072cf258ab345d4d57d400694
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 domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded links are indicative of a common phishing lure.

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 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://vilenefex.ru/strik?utm_term=motorola+g+3rd+generation+battery
    • http://zdsshop.top/emergency_medicine_pa_jobs_coloradotx6uv.pdf
    • http://sesizuxewewax.mygamesonline.org/rinisifamerawewope.pdf
    • https://cdn-cms.f-static.net/uploads/4443810/normal_604847d0a90c1.pdf
    • http://dom-bita.org/3916234830q6asj.pdf
    • http://giocodigital.website/pharma_qa_manager_interview_questions_and_answersjslpi.pdf
    • http://pinopizo.sportsontheweb.net/jivijimumosope.pdf
    • http://titanof-filtr.ru/dell_u2711_user_manualkn9ik.pdf
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/f195971c827c99b.pdf
    • http://lovemecompletely.com/jexovoruwojupadopxt197.pdf
    • http://granitmetrospecstroy.ru/brain_surfing_2_level_93_beautiful_necklacezamil.pdf
    • http://suzamakulamuj.mypressonline.com/pizuwukejare.pdf
    • https://cdn-cms.f-static.net/uploads/4408703/normal_603a5b948c78b.pdf
    • http://helpverifedbadges.com/jujunelezubumoliwodizibuoayxy.pdf
    • https://menudobuwowewil.weebly.com/uploads/1/3/4/7/134765252/xomosadi.pdf
    • https://static.s123-cdn-static.com/uploads/4459323/normal_5ff802e48b43f.pdf
    • https://cdn-cms.f-static.net/uploads/4480743/normal_601f0ca75d2c8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_0111bf4bbb9e4ae0bd01f0cef3e0b4c0.pdf?index=true
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_dab9c11cdfb4473281f3eeb1f3441cd6.pdf?index=true
    • https://1b53f64c-3596-40ff-86ea-95cec8902569.filesusr.com/ugd/838e7e_4bc283d0414b4a61a6558ac25c331285.pdf?index=true
    • http://sawesupunozigiv.atwebpages.com/79782062055.pdf
    • https://ebd73b9a-b255-48a5-b781-2bd84b483b4c.filesusr.com/ugd/956c05_b9f96d87b8644b7187f3960b3db809fa.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd54.bin
f7a8aed76298cae21c269d311645432dcfee46e8ff5accf4b7980e6c0856e27e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD54 5228 bytes
font_01_sfnt_off0000ef36.bin
6135b4963c9ec9047e0fe53a2ba0c1da46ccb13af2496ac6dae0b793d909edb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF36 10976 bytes

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