Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf6707a9b83caaa…

MALICIOUS

PDF

77.3 KB Created: 2021-03-31 05:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 717bfca0ff5c217571a95832d673ed3f SHA-1: 3c0109a52134ed7d7f61bc36c32e2219f2555595 SHA-256: 0cf6707a9b83caaa196d48884cbba04647afce77529feaddcfbdb3eb6fe996bd
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or phishing attempt. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://botokaw.ru/award?keyword=agroforestry+design+pdf
    • https://cdn.sqhk.co/fekigimuzib/oZ7lzgi/area_of_parallelogram_formula.pdf
    • https://bujovuve.weebly.com/uploads/1/3/0/7/130738596/1764084.pdf
    • https://muxixeronazuxup.weebly.com/uploads/1/3/4/5/134508557/5616253.pdf
    • https://static.s123-cdn-static.com/uploads/4471514/normal_5ff7f6160a551.pdf
    • https://cdn-cms.f-static.net/uploads/4368244/normal_605cd6946be9b.pdf
    • https://cdn-cms.f-static.net/uploads/4450434/normal_603671b4dce39.pdf
    • https://cdn-cms.f-static.net/uploads/4420260/normal_600a28768e4b6.pdf
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/c16b4e5.pdf
    • https://cdn.sqhk.co/mekerijiwuv/bON2gez/driving_licence_name_change_process.pdf
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/9487464.pdf
    • https://cdn-cms.f-static.net/uploads/4384164/normal_601b52b152cb7.pdf
    • https://cdn.sqhk.co/digubamot/jhMjh1F/zuzesupofavor.pdf
    • https://lopetumidola.weebly.com/uploads/1/3/3/9/133989387/vowapavezitavu.pdf
    • https://rapovadok.weebly.com/uploads/1/3/4/7/134705404/jujejeki-depix-surorujuxez-memutofile.pdf
    • https://bemujegifa.weebly.com/uploads/1/3/5/3/135312506/2131221.pdf
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/2103796.pdf
    • https://nunesevafarub.weebly.com/uploads/1/3/0/8/130874378/xujexelexezusuxo.pdf
    • https://static.s123-cdn-static.com/uploads/4412763/normal_5ff0f0884df4d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3c78eab7-cdad-4db3-8bd3-5caefe6e385f/22615649858.pdf
    • https://uploads.strikinglycdn.com/files/3ba530c3-20ed-48d5-958f-5f867bd371d0/sat_subject_test_scores_for_georgetown.pdf
    • https://uploads.strikinglycdn.com/files/b5a58087-f74a-4e17-a754-f088343b0f66/vokipixiv.pdf
    • https://uploads.strikinglycdn.com/files/7f340931-9cc7-4523-8826-f293faa26305/folimozevod.pdf
    • https://uploads.strikinglycdn.com/files/4304bdfd-2243-4f5f-bd9e-a5eecd3c7c71/is_model_s_better_than_model_3.pdf
    • 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_off0000f20e.bin
cd2a61bad8b944e204137660e747dd0105d25d17f5177c48ceeee0824f3ba194		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF20E 5056 bytes
font_01_sfnt_off00010365.bin
3be656c9c24219744f2be4e53242501c69e91951e20bfd683875fbf1e0738163		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10365 10648 bytes

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