Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e0dc17773ca39f…

MALICIOUS

PDF

100.2 KB Created: 2021-03-22 19:09:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06a0741569089ca3c74f52c2fb105dac SHA-1: de70ce8de20ac788d33181a4be6c0382a472e7ad SHA-256: 46e0dc17773ca39fe55b76d648d0cb7e66a54e2819fe3c4cd6d2e0ed83a807ea
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, with one prominent link pointing to a suspicious domain. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm or phishing attempt. The 'SE_CALLBACK_LURE' heuristic suggests a potential callback phishing or tech-support scam context, further supported by the presence of external URLs. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wix?keyword=robert+adams+free+pdf
    • https://cdn.sqhk.co/fabukujeb/VbDSXsN/63961658208.pdf
    • http://tirudibemaj.22web.org/mojoteributivu.pdf
    • https://bipozoxadedisaj.weebly.com/uploads/1/3/1/1/131164124/doxelaxejix.pdf
    • https://cdn.sqhk.co/mefomixut/AfjiiiK/kisuxejuvivogobemipowute.pdf
    • https://cdn.sqhk.co/madilaxetevo/ejhijk1/fall_guys_wallpaper_ps4_gameplay.pdf
    • http://voxamuzovo.22web.org/critical_thinking_questions_and_answers_for_interview.pdf
    • http://vobonenagixavus.66ghz.com/sababimitun.pdf
    • https://kowexemi.weebly.com/uploads/1/3/1/8/131872048/zenapegakevarop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/83485ae1-7d79-41fe-8132-7c731ffaee82/zemesenelulozos.pdf
    • https://uploads.strikinglycdn.com/files/b385260d-38d4-43ef-88ef-76231c03138a/sowuzuvo.pdf
    • https://s3.amazonaws.com/tixedujegibex/hindustan_copper_ltd_annual_report.pdf
    • https://s3.amazonaws.com/mefadedosuw/property_and_casualty_insurance_exam_study_guide.pdf
    • https://s3.amazonaws.com/fowonaxul/video_er_ultimate_apk.pdf
    • https://uploads.strikinglycdn.com/files/d806a3d1-2b38-47f6-81aa-3c5d7fd75f34/jubef.pdf
    • https://uploads.strikinglycdn.com/files/d6b11c9c-96ed-4aa8-be2c-1e0f0c5d0830/cheap_mini_dvd_player_with_hdmi_input.pdf
    • http://zukewanika.rf.gd/coursera_introduction_to_marketing_quiz_2_answers.pdf
    • https://s3.amazonaws.com/pevuwarobuvowa/15266833277.pdf
    • https://uploads.strikinglycdn.com/files/e6716ab9-9ab4-47c9-92ef-0512d5ee3be0/how_much_is_planet_fitness_fees.pdf
    • https://s3.amazonaws.com/baposivarabuj/america_history_of_our_nation_online_textbook.pdf
    • https://uploads.strikinglycdn.com/files/380b8ee4-7ab7-449e-80dd-0c3cd00351ac/widofixemako.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_off00014683.bin
70da5c513092753fcfeed26834f4ef9c4d7ee07526ada74cb413028d336ce4d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14683 5304 bytes
font_01_sfnt_off00015872.bin
7011bc739952cae5cd5ccb0616131c9296f60d2bed879243ecf8e1643622d9b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15872 12784 bytes

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