Malicious PDF — malware analysis report

Static analysis result for SHA-256 afdf35a1364095ed…

MALICIOUS

PDF

84.4 KB Created: 2021-05-16 23:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7009f1166275c6772d8e02b4f4586690 SHA-1: ecc2f86c8740f388848da6c0c1ea1b5ffb3e1a30 SHA-256: afdf35a1364095ed3c9349fcd19b6e992af107a3d6df6b084fd898e4dc6fa0ef
96 Risk Score

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. The embedded URL `https://nipisod.ru/strik?utm_term=ti+84+plus+c+silver+edition+os+4.2+download` suggests a lure related to downloading software for a TI-84 calculator. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a phishing attempt designed to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=ti+84+plus+c+silver+edition+os+4.2+download
    • http://demazopozegefo.22web.org/94641316558.pdf
    • https://cdn.sqhk.co/gujadozede/TGgcgdN/virus_deaths_by_state.pdf
    • https://cdn.sqhk.co/goberirud/6ieigji/bride_and_groom_perfect_wedding_dress.pdf
    • https://cdn.sqhk.co/jabisopomuxo/gjazIih/90106192825.pdf
    • http://gepexoliv.medianewsonline.com/88402412493.pdf
    • http://bodipok.getenjoyment.net/mifuse.pdf
    • https://cdn.sqhk.co/norowitidot/jhhaghe/cross_stitch_patterns_free_baby.pdf
    • http://rejorevubirobu.sportsontheweb.net/bissell_powerforce_helix_vacuum_belt_replacement.pdf
    • http://tularobumof.66ghz.com/dosowanibagimigogumisuxiz.pdf
    • http://saxosoxajivovud.medianewsonline.com/kupupixuvom.pdf
    • http://liwadaxezaf.getenjoyment.net/rufabe.pdf
    • http://tatanip.medianewsonline.com/48347569105.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e8a73319-eb10-4557-9d23-2448e0bd3724/kiletofewufilo.pdf
    • https://uploads.strikinglycdn.com/files/98d1a192-b6ec-4e63-ae3a-35b5313902c1/how_to_search_google_images_with_a_picture.pdf
    • https://uploads.strikinglycdn.com/files/1bf54583-c508-4d46-a59e-4df1e2098059/23034143452.pdf
    • http://nodefojabotozij.rf.gd/73301217459.pdf
    • https://uploads.strikinglycdn.com/files/62694574-e3d2-40d0-acef-386e52f3dba6/6301715022.pdf
    • https://uploads.strikinglycdn.com/files/20f749cc-9952-43cc-b85c-f0795efbbac5/guest_relations_manager_job_description.pdf
    • http://zuvemodu.rf.gd/rsos_admission_form_2020_20.pdf
    • https://uploads.strikinglycdn.com/files/f00fa00c-ac98-4b39-b72a-2947cb2ee7a5/robejagepivufuxik.pdf
    • https://uploads.strikinglycdn.com/files/93040b34-7a4d-4c08-a1db-433e8577f52c/74567574045.pdf
    • http://pumikowexudat.onlinewebshop.net/29273792555.pdf
    • https://uploads.strikinglycdn.com/files/ec15028e-9dc6-4b26-98d0-ec59b66e1be4/vevowopogikuw.pdf
    • https://uploads.strikinglycdn.com/files/c39f07c1-c747-49a7-b2b0-683093a19d0c/retowijofon.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_off00010910.bin
e771f5d3fcb1b85c08ca99749faeabe6815c94dc70e2180c5be1a488e69609ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10910 5612 bytes
font_01_sfnt_off00011c57.bin
202ebcd342307a855e213d149bb94752b6a6dcc5ed33e3489c9d15ea6551d14e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C57 11484 bytes

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