Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2bdeb75a815fbbd…

MALICIOUS

PDF

75.4 KB Created: 2021-05-08 04:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 250eb8b789e632b873dc1568f45f876f SHA-1: 6dee527a0e456883a9dd0fd4027b70f4048923e7 SHA-256: c2bdeb75a815fbbd0c612c61a1bcbb0e132151fd688649dfaea7623e480da2dc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting and potentially malicious domains, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=how+to+revive+prayer+plant PDF link annotation
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/3011307.pdfIn PDF document text
    • https://doliwejivus.weebly.com/uploads/1/3/4/3/134353379/pulakarurexor.pdfIn PDF document text
    • https://kisuvali.weebly.com/uploads/1/3/1/1/131163683/1019784.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5fd60f7dd6c47.pdfIn PDF document text
    • http://ibkreactiva2020.com/how_to_learn_to_draw_for_beginnersghbw8.pdfIn PDF document text
    • http://streamsweets.com/toolwiz_photos_pro_editor_mod_apk_download0cpo8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415052/normal_5fee9b4d43eac.pdfIn PDF document text
    • http://dkblogin-de.best/78878765920th4o7.pdfIn PDF document text
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/dujamoxodo_vovigixa.pdfIn PDF document text
    • http://topshops.website/52875568886tf8it.pdfIn PDF document text
    • https://gufonalika.weebly.com/uploads/1/3/4/0/134096228/284612.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/70600996343e617e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459185/normal_6010e8efd66cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_6016682098231.pdfIn PDF document text
    • http://smcjd.com/tisovilajenulofamemijejezq0zy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_5fd66403783e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476421/normal_600a457a5dfba.pdfIn PDF document text
    • http://hugertely.xyz/72169150837zz2ob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483362/normal_60037fdbbd285.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380867/normal_5fe11b182760e.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/midaguvimabof/wokutexamolajakejo.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/esc_guidelines_sudden_cardiac_death.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_off0000eca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA0 4848 bytes
SHA-256: bdf7ad85b6fa39539aef7406961e52b8c51c346e09ebf0918b6ab1bf3084d60d
font_01_sfnt_off0000fd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD45 10236 bytes
SHA-256: 5eb77165516af307a2b3d46e2d78e048ae48d43c116ca7b8ec405744ad0d5e62

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