Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc467ac91694554…

MALICIOUS

PDF

85.3 KB Created: 2021-04-01 11:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4ee59dee50895c130779e73e58cd476d SHA-1: 8c92bb23e633b71f5541d95aa42ed8cd599dbaf8 SHA-256: 0cc467ac916945548c215f67990cc44ca10e4835a2061c14b3bf0c349c7c906b
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including external URI usage and ML classification. The embedded URL 'https://nipisod.ru/strik?utm_term=apostol+rafael+ramirez+2020' is a primary indicator of a phishing or malware distribution attempt. The PDF also utilizes a link farm on disposable hosting, further suggesting malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/strik?utm_term=apostol+rafael+ramirez+2020 PDF link annotation
    • http://remont-kholodilnikov.website/mofafa8557k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481400/normal_605d67154f49e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_6017ddcc990a7.pdfIn PDF document text
    • https://zamelati.weebly.com/uploads/1/3/4/6/134652334/levepadex.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/ji0jjjj/pixel_blood_online_hack_apk.pdfIn PDF document text
    • http://ig-support-service.com/8133747153r2doj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471253/normal_605ee6ecd5724.pdfIn PDF document text
    • https://sijudunewofas.weebly.com/uploads/1/3/4/6/134696620/pawiduzo.pdfIn PDF document text
    • https://zabidikigez.weebly.com/uploads/1/3/4/5/134594795/fenukebexukomevobara.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478383/normal_60062c5a5cd0b.pdfIn PDF document text
    • https://cdn.sqhk.co/tifatuju/2nhf4cA/gelavamejidenugaguzepet.pdfIn PDF document text
    • https://kisagisetiduke.weebly.com/uploads/1/3/4/7/134762251/19a066dbce4.pdfIn PDF document text
    • https://bomexufimewaw.weebly.com/uploads/1/3/4/5/134517434/raguzigifin.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://s3.amazonaws.com/damerirazib/98231831204.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/future_fight_shadowland_guide_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bc11a3c-6b42-4f8a-82d7-26249d1dd66b/free_wordpress_themes_for_business_blogs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/724d6e71-8f89-459f-bf2d-308244f5308b/93171920865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef2dec48-cb5f-437c-b1c3-f754a8fae503/troy_bilt_storm_2840_parts_diagram.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_off0001002e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002E 5040 bytes
SHA-256: 3900481caf3ba845b40c0bd8d036b30e5391bcc59532f4aa0186012b2fe52ed5
font_01_sfnt_off00011151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11151 12224 bytes
SHA-256: cf5188fb457634d77e595558a73e2468f8ae149b09438cc133105de001f95e2c
font_02_sfnt_off00013875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13875 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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