Malicious PDF — malware analysis report

Static analysis result for SHA-256 6306c2df6cab0bc0…

MALICIOUS

PDF

73.2 KB Created: 2021-03-17 23:07:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c51827f3e8a989c745bf7b1f17312639 SHA-1: 053a295e2d004698c9303ebaf2f15bfed8991b92 SHA-256: 6306c2df6cab0bc0b4ef8c520123b285190271329242a9bd55cb5f4b438e8b1f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is lozipotod.ru, which is likely used to host or redirect to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/award?keyword=apache+tomcat+7+documentation+pdf
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/zebewafu.pdf
    • https://voxonororipesap.weebly.com/uploads/1/3/5/3/135383222/simexumagofamozig.pdf
    • https://kijufonujaza.weebly.com/uploads/1/3/4/8/134863317/59662d6f857.pdf
    • http://ritixabig.iblogger.org/fikarexomabulinijozibi.pdf
    • https://xekuvezenigut.weebly.com/uploads/1/3/5/3/135346982/tozomewo-devesoxelidonol.pdf
    • https://cdn.sqhk.co/gixedomawa/ijaic5t/53102166141.pdf
    • https://cdn.sqhk.co/gaxazazul/ZoyWeAZ/billie_eilish_merchandise_uk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/61491b70-70b0-4d85-ae32-b93e84877ba6/78006767286.pdf
    • https://ba739632-11db-41f7-a023-683a20e55d36.filesusr.com/ugd/99835b_0254c1580fc4469eb440c6870ede4d93.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0cfb90d2-ef38-4dbf-8bf1-c167309fb1fd/30120475098.pdf
    • http://bejutamukedus.epizy.com/anguttara_nikaya_3.pdf
    • https://82cb18f6-4a40-4824-ac11-10070f72ce02.filesusr.com/ugd/5aec95_8fe776df96b348aab7ebf30d07edb86f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/614db164-b594-443d-88cc-43941b303876/korabumebiwinir.pdf
    • http://xugonowelimije.epizy.com/gejala_asidosis.pdf
    • https://uploads.strikinglycdn.com/files/93a87df6-6df1-48a5-8018-02b76ec123db/xuxudisobopuxaraju.pdf
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_bb34435c8321440588491d433bffaa7d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a0b05435-963b-41fa-bc6e-8684a7fa5533/how_to_flash_american_megatrends_bios.pdf
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_dda2ae04adf54f6eaf5d76cca10c4dee.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5f272188-b17b-4286-97ea-37a51db97619/behavior_intervention_plan_template_aba.pdf
    • https://uploads.strikinglycdn.com/files/28269937-7f1d-4d60-ad28-9214978e4253/how_to_program_a_clicker_garage_door_opener_craftsman.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_off0000e2aa.bin
d4dfd80980c7499cd9827310417122c1bb6c11895837bd374b5b361e01797075		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AA 5160 bytes
font_01_sfnt_off0000f424.bin
092480ef629b8233788dd54ebcfd7e733bfd9b71ab8aa09053c39b4cabcaca4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF424 10400 bytes

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