Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc1077564634e6a…

MALICIOUS

PDF

83.7 KB Created: 2021-01-26 12:47:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5aeb7b212deb2f776091d4adf6e73561 SHA-1: 9fdc672fe7482c9a57fc8eaaafa319032f475b11 SHA-256: 0bc1077564634e6a818dfd7142508495da002665e63f9e8dc25624d158fbc97c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by heuristics as a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect the user to a malicious site.

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://trafffe.ru/123?utm_term=synonym+for+assert PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391599/normal_5fd6109088fe8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382413/normal_5ff2b9fded329.pdfIn PDF document text
    • http://sweetmeet.online/pinball_museum_asheville_arcadenouby.pdfIn PDF document text
    • http://snatural.space/xtreme_soaring_3d_2nixrc.pdfIn PDF document text
    • http://fruktovik.com/dj_song_mix_software_for_pcys6nk.pdfIn PDF document text
    • http://iceteas.space/marvel_future_fight_best_premium_character_20203j1ia.pdfIn PDF document text
    • http://cardioactiveuficiale.site/vokogutufonaxetobamofudorlqbpn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/angry_birds_friends_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/sajawunufemugatemaren.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/zabopewaluz.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/uzreport_futbol_tv_telegram.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/fracture_imdb_2019_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/algorithm_design_manual_python.pdfIn PDF document text
    • http://nivobilov.epizy.com/breakup_wallpaper_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/60169739658.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C28 5088 bytes
SHA-256: 42d22a777611c08480afce37f01a0b9819c51a3b4870342bcbb5e881f2b4cc5c
font_01_sfnt_off00011d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D63 10656 bytes
SHA-256: e36325df1b9288e82e0d22a5fbf2ebd893c376e6b11f1ca110d745086d629903

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