Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1406b8239c35af…

MALICIOUS

PDF

78.0 KB Created: 2021-03-15 17:00:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9bcb681abf0b18e045d76b0545415b77 SHA-1: 24138a4840e6fb5104cc0e0c76723bd437de36f4 SHA-256: 9c1406b8239c35af6099ddc68034eb3112cbdcfc84db5df618243b2781b6f09e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to potentially malicious domains, disguised as educational content like 'angle of elevation and depression worksheet'. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wix?keyword=angle+of+elevation+and+depression+worksheet+2+answers PDF link annotation
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/sewab.pdfIn PDF document text
    • http://tuimag.ru/25292340276ytxty.pdfIn PDF document text
    • http://sunny-web.ru/solving_congruent_triangles_worksheetw2smv.pdfIn PDF document text
    • http://wrinklestiltskin.com/can_you_have_a_birthing_partner_during_covidy8blp.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/75023038535.pdfIn PDF document text
    • http://heleogose.online/citizen_eco_drive_skyhawk_wr200_blue_angels_manualcuzqy.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/filmywap_chakravyuh_movie.pdfIn PDF document text
    • http://goldalbum.ru/what_does_arrow_gpi_meangi6mo.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/15918116973s6xmq.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/jojodewilapiwagekewote.pdfIn PDF document text
    • http://eagleaff.com/wugijop4g8b.pdfIn PDF document text
    • http://hookup755.fun/21084501374vrwmq.pdfIn PDF document text
    • https://makirogu.weebly.com/uploads/1/3/0/9/130969002/c4b40fbfaeeeb.pdfIn PDF document text
    • http://help-copyrightservice.xyz/rimepewemurikikisofekayma7v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/16abc481-52ce-483c-a18b-6a098adb3ea4/siriusxm_stratus_7_satellite_radio_with_vehicle_kit_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd006af-507c-4c59-80d1-a9bcf2049d24/hp_deskjet_2541_cartridge_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2619d36-88af-491e-8c4a-a26f4978b780/gemezez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdd54262-834b-4727-8dfa-caa8a9b8f16a/jitterbug_phone_walmart.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DA 5640 bytes
SHA-256: e9fb9ad5df8d6a5aacbe6212c69196e8afd6140bee5259c8d391d251da292f26
font_01_sfnt_off0001072e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072E 10400 bytes
SHA-256: f27f59c39f1adf4ae855831f8b8a4dc2e87b76556dc5eef002a8a007b62dbf33

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