Malicious PDF — malware analysis report

Static analysis result for SHA-256 89cd3deef642180c…

MALICIOUS

PDF

68.0 KB Created: 2021-03-28 10:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecf20edeffd89f9bb7f712a8b3eeebd3 SHA-1: ecce268b51d7087218af865230ff88b49b36ad60 SHA-256: 89cd3deef642180c51bc7b1edfb21e83de3182321224313373b81fa303405a2f
96 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to academic exercises, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://kuzutuzo.ru/award?keyword=present+tenses+exercises+advanced+level+pdf
    • https://cdn.sqhk.co/subilikiwi/hE2Q9ii/purabibakipom.pdf
    • https://zokejiwiperasuk.weebly.com/uploads/1/3/4/6/134668939/gokejepajejij.pdf
    • https://fivujage.weebly.com/uploads/1/3/4/3/134316273/2138807.pdf
    • https://jadipiruw.weebly.com/uploads/1/3/0/8/130814676/luzekimepu-fulivin.pdf
    • https://cdn.sqhk.co/xelajuwodaf/stkvji2/cinema_cinemark_shopping_brasilia.pdf
    • https://muwalivom.weebly.com/uploads/1/3/2/6/132695892/kasiruf-pewol-losegimup.pdf
    • https://vavaterojitenoj.weebly.com/uploads/1/3/4/8/134898986/sudipojunikog-puputom.pdf
    • https://lemitixodage.weebly.com/uploads/1/3/4/8/134868200/aac46c22fb6.pdf
    • https://jitipukojid.weebly.com/uploads/1/3/4/7/134707402/tamefiziliwox_wuredaletosuv.pdf
    • https://fikoroviv.weebly.com/uploads/1/3/0/7/130740338/ef6fce822e4.pdf
    • https://fomememuvur.weebly.com/uploads/1/3/4/0/134000402/wakabulebejifox_bidodipowusu_gapefivudana_gapuxudifav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/58c457cf-af6d-482f-b915-6f296631a48a/91307002480.pdf
    • http://fopagozijudiri.epizy.com/47159937441.pdf
    • https://uploads.strikinglycdn.com/files/cf97b67d-0453-46ca-872a-25bdbd4fc05d/talk_to_me_in_korean_books.pdf
    • https://uploads.strikinglycdn.com/files/caf09cb9-9c31-492c-b1a9-985be4acaa86/37628485143.pdf
    • https://uploads.strikinglycdn.com/files/745c582a-aff8-4599-b41f-2126f0459aab/9207192974.pdf
    • https://uploads.strikinglycdn.com/files/a4ba4b2a-170a-4578-a84a-da36545ce365/historia_de_la_geometria_para_nios.pdf
    • http://xaxurotowikofew.rf.gd/ritiwaselerod.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_off0000cd90.bin
967d7a798d468519224c0b6d0b1928f8dfd669aaed24db1a87b9a9fa72ba59fb
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD90 5280 bytes
font_01_sfnt_off0000df9f.bin
63af6823a275858679191cfd816df94de995c43db15cdc546749608ab02b8bd5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9F 10332 bytes