Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7de3de3435079ae…

MALICIOUS

PDF

68.9 KB Created: 2021-03-16 23:28:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b61f3afc99096e026c6ccd2fd4d829e2 SHA-1: b5380fe477ca70f0312134422ee48be77c12637e SHA-256: d7de3de3435079ae2e318620866a12c87a57e8bc27666c2b23322664be034251
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that directs the user to a suspicious domain, likely for phishing purposes. ML and ClamAV heuristics strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of the malicious URI is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://vilenefex.ru/123?utm_term=bongo+fleva+mpya++2019
    • https://static.s123-cdn-static.com/uploads/4470841/normal_5fe3f720409e3.pdf
    • http://wurilozi.scienceontheweb.net/best_pimp_rappers.pdf
    • http://wodedutipif.medianewsonline.com/sri_chaitanya_charitamrita_in_bengali.pdf
    • https://cdn-cms.f-static.net/uploads/4501214/normal_603d30f442195.pdf
    • http://kujunat.medianewsonline.com/99631936859.pdf
    • https://xikewipevugid.weebly.com/uploads/1/3/1/3/131383679/56e2faa.pdf
    • https://cdn-cms.f-static.net/uploads/4449193/normal_601a99e95c379.pdf
    • https://cdn-cms.f-static.net/uploads/4449998/normal_60387865867fe.pdf
    • https://static.s123-cdn-static.com/uploads/4408481/normal_5fddfa98c9e92.pdf
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/1158455.pdf
    • http://wuroguredogir.getenjoyment.net/wind_in_the_willows_song_lyrics_friends_together.pdf
    • https://joposiga.weebly.com/uploads/1/3/5/3/135399072/86369cf09ef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kepofif.onlinewebshop.net/peak_jump_starter_300_wont_stop_beeping.pdf
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_195b56b9d93f4829a44e110a2f8d9f09.pdf?index=true
    • https://s3.amazonaws.com/vasofirida/cheque_book_request_letter_format_hdfc.pdf
    • https://s3.amazonaws.com/sevoga/didobakezejokevavinixo.pdf
    • https://uploads.strikinglycdn.com/files/ffa6295c-3ae0-44a0-9439-8e83127b287b/lemopizujaga.pdf
    • https://s3.amazonaws.com/jedaxopopuko/psalm_23_vers_1_5.pdf
    • https://s3.amazonaws.com/fosawef/babylon_dictionary_free_english_to_persian.pdf
    • https://s3.amazonaws.com/wamatasamegu/most_popular_safety_topics_on_the_internet.pdf
    • https://uploads.strikinglycdn.com/files/3a0228c9-e402-416a-b097-e03895670679/jipogelesaxorozuvibo.pdf
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_bccb903c079b40fa81ffb7b56750fa07.pdf?index=true
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_28b17182b7df4f7aa4d40e7f3325ea4f.pdf?index=true
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_e04d154d84ff4e6ab0900d501a22e4d6.pdf?index=true
    • 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_off0000d102.bin
8b724e1ee392f06aa79c60fcd2a584156dedccb7debaa55f50b484806a96fc1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD102 5640 bytes
font_01_sfnt_off0000e451.bin
a06ce96960eb5f407838a166a61d00a8e3351fed91a698921c40843457143c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE451 10044 bytes

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