Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c4759f24c0daa5…

MALICIOUS

PDF

79.2 KB Created: 2021-03-11 09:12:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6485ebf6d656700e76a95347df94d260 SHA-1: 83b3198a03550b9e8734642a5cd34b7c44ffac5e SHA-256: f2c4759f24c0daa59dbcdcd40810b97f682169bfc2fb790e72f31156d3801e80
96 Risk Score

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 and ClamAV as a phishing or malicious trojan. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely as part of a phishing campaign or to download a secondary payload.

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://pelibifir.ru/123?utm_term=cabrestante+manual+bricomart
    • https://cdn.sqhk.co/konafomaz/0gc56ge/stellio_music_and_mp3_player_activation_code.pdf
    • http://vehicleusains.com/38780792427w9qrc.pdf
    • http://safijejog.mygamesonline.org/osha_safety_manual_for_healthcare.pdf
    • https://cdn.sqhk.co/sisadenev/ijYgjhj/78208582141.pdf
    • https://cdn-cms.f-static.net/uploads/4405193/normal_6014d935cff10.pdf
    • http://mamubisuk.mypressonline.com/27368585305.pdf
    • https://cdn-cms.f-static.net/uploads/4380883/normal_601f2e2808948.pdf
    • https://cdn-cms.f-static.net/uploads/4490122/normal_604270f6ebf97.pdf
    • https://cdn.sqhk.co/baxijaxazixi/WjcIjbc/jutadamatasivefijejuvozoj.pdf
    • http://lightly.store/dirixupikkeow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c50f7f39-7275-4199-80cc-4afcfde1c03d/how_to_change_braun_thermometer_from_fahrenheit_to_celsius.pdf
    • https://uploads.strikinglycdn.com/files/c66d06bd-08c6-4f08-a294-4c1bff801ad9/53271763399.pdf
    • http://rosevasejila.myartsonline.com/chuunibyou_demo_koi_ga_shitai_characters.pdf
    • https://uploads.strikinglycdn.com/files/2f17de1b-9f36-4b77-8f05-5fc531fb9640/3_cups_mashed_sweet_potatoes_equals_how_many_pounds.pdf
    • https://s3.amazonaws.com/pasutiz/osmania_university_degree_hall_ticket_2019.pdf
    • https://s3.amazonaws.com/votubukaxogilix/40288211222.pdf
    • https://uploads.strikinglycdn.com/files/c11205cb-b8df-431a-9de3-35279fa6281d/how_to_exercise_authority.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_off0000f929.bin
8140908e8a23c279d0d20bc3251f703605bd947f90c06e0547f7205069c6bafd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF929 4992 bytes
font_01_sfnt_off00010a03.bin
e0a5cc7fba101f926ce74795d80394091275cd2cb31b1527ed0722d2d052139d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A03 11068 bytes