Malicious PDF — malware analysis report

Static analysis result for SHA-256 292a06d322f926aa…

MALICIOUS

PDF

76.3 KB Created: 2021-03-20 22:32:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 715b5dd344d2b9d64f0c28197ad26031 SHA-1: 7031fc07ec2a7eff68bf131fe2507bf301e197bf SHA-256: 292a06d322f926aafa503f3fb79dcc1338d30464868f817be04906651ce3b030
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on external services. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the structure suggests a malicious document designed to redirect users to a network of potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/award?keyword=avalon+high+book+2+pdf
    • https://vizijupazikek.weebly.com/uploads/1/3/2/8/132814338/bejiso.pdf
    • https://cdn.sqhk.co/simikimira/dWHQi4d/lucky_block_recipe_no_mods.pdf
    • https://cdn.sqhk.co/nanagajog/ijRShc7/calendar_day_calculator_2020.pdf
    • http://lawigimik.iblogger.org/autocad_free_2016_student_version.pdf
    • https://cdn.sqhk.co/bexamajuw/kcwqghx/table_tennis_ball_thrower_machine.pdf
    • https://fatanavaxiwakat.weebly.com/uploads/1/3/4/6/134606547/2598300.pdf
    • https://cdn.sqhk.co/guvevifowo/IlgZ6gd/xujeluwifebalolilela.pdf
    • https://cdn.sqhk.co/wejagamewo/vDjdgg9/binixusibawosafafanu.pdf
    • https://static.s123-cdn-static.com/uploads/4374704/normal_60000c647d0f7.pdf
    • https://siwusoxol.weebly.com/uploads/1/3/4/5/134584737/rabuxifivetukini.pdf
    • https://static.s123-cdn-static.com/uploads/4481527/normal_5fed6a685913f.pdf
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/vitulix.pdf
    • https://marejeloxivel.weebly.com/uploads/1/3/4/7/134709382/nawosimepifakimupuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/13b5823c-fffe-43d6-af7d-601bf6ba40f6/bank_compliance_department_responsibilities.pdf
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_bebe185658754830a0e32c47913ee186.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c0f37dcd-ffdd-4587-aba4-2e6596c9694f/92225347676.pdf
    • http://zebixefaxiloj.rf.gd/rewagufexitavivitape.pdf
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_26df3e3e760f4a1891ac28f85eebe013.pdf?index=true
    • http://nikibulafejew.rf.gd/cardiorespiratory_assessment_form.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_off0000ec4b.bin
9fae7018890a62c71dbdc140d24d3b5e16ec5a62190d1e6276ce287010618478		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4B 5412 bytes
font_01_sfnt_off0000fec1.bin
a2b7d2df64d0eec86f52947bb2a415a07be92206a7b98d8abc38fc43ca61d02a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC1 11088 bytes

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