Malicious PDF — malware analysis report

Static analysis result for SHA-256 0225f18c4b1ae8e7…

MALICIOUS

PDF

83.6 KB Created: 2021-03-15 02:18:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 941c8ff1d5f6313ef6d37994396b3aad SHA-1: 79188ee70fa71c88eab874466b9a7c2925801ab7 SHA-256: 0225f18c4b1ae8e78b1725c222fa878af4df0ac56a23ebcf309d556b34adb077
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain that is likely part of a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

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://xajibur.ru/strik?utm_term=american+harvest+pellet+stove+6039
    • http://pegijegur.mygamesonline.org/noborojivajuzegu.pdf
    • https://cdn.sqhk.co/filomada/hgjbhby/w3schools_javascript_alert.pdf
    • https://cdn.sqhk.co/jizapamilizo/4ia5jiW/71765226621.pdf
    • http://gonugotez.22web.org/jasper_report_for_java_developer.pdf
    • http://bulakirip.getenjoyment.net/a_static_budget_is_appropriate_for.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://beduxuluwuniva.rf.gd/58984105337.pdf
    • https://uploads.strikinglycdn.com/files/be28665d-c2fc-4cec-b9d3-c9615d98390b/59820626725.pdf
    • https://uploads.strikinglycdn.com/files/cc377dfe-875e-4b51-8e2a-6ee309171fc0/24066293050.pdf
    • https://uploads.strikinglycdn.com/files/b31a74f1-3c76-4aa0-90a3-c7878feca093/alesis_3630_compressor_manual_espaol.pdf
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_9cd5a1e233c440089dc8d2bfa26633ae.pdf?index=true
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_8c9a044173ab433880a99156427450bf.pdf?index=true
    • http://sojufuka.atwebpages.com/62848457113.pdf
    • http://dadagafabixoxev.epizy.com/dorozifagow.pdf
    • https://c3e810f9-371e-40b9-9a0b-4695a496ec77.filesusr.com/ugd/2c7c49_d1b29671b61f477d9b256293186f9dca.pdf?index=true
    • https://uploads.strikinglycdn.com/files/145778ce-e62a-464e-9c98-18ca0159a2e8/the_ancient_magus_bride_episode_4_facebook.pdf
    • https://uploads.strikinglycdn.com/files/26bd1d7b-e085-47ee-b300-b7c1357575e5/rerugotov.pdf
    • https://uploads.strikinglycdn.com/files/b170039c-88e7-46b1-9b8f-057df38d68dd/how_to_install_sony_surround_sound_system.pdf
    • https://uploads.strikinglycdn.com/files/a8801ff4-5357-43c2-b88c-e3345db43d3d/70452423909.pdf
    • http://tavarifa.epizy.com/53993106983.pdf
    • https://uploads.strikinglycdn.com/files/23a29d8e-c368-461a-8ecb-5d6771023ea2/33520895768.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_off0001075a.bin
ea70f5581ea5b02192f98288dd95dd10945119aac4a6565689adeae58df24256		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1075A 5836 bytes
font_01_sfnt_off00011b01.bin
9251c7dd59c1493ed9c0a1f96195648c7d9b8677a76c75e5d501b507431f9165		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B01 11156 bytes

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