Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf3a66d2a9a37e2…

MALICIOUS

PDF

75.2 KB Created: 2021-04-30 22:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 889895db7ee3854a1686b303b41b3bc7 SHA-1: 8e9ca38484069784a930ec3123a7939044e9b886 SHA-256: 2bf3a66d2a9a37e21d34ab7cd11d93597a83918ddd6ac3cc3fd2ac38fd1a9520
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. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to an advertisement.

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://jumiwimov.ru/strik?utm_term=antique+craftsman+drill+press+for+sale
    • https://cdn.sqhk.co/popuzanuguw/uogfgda/kufujodirokifilaluwute.pdf
    • http://sufofure.mywebcommunity.org/bird_table_plans.pdf
    • http://fudopajir.iblogger.org/46107625154.pdf
    • http://xazupadapafow.mypressonline.com/13169995220.pdf
    • https://cdn.sqhk.co/xafiguzi/ijXibq1/mi_music_apk_for_mi_a3.pdf
    • https://cdn.sqhk.co/letopoto/fsge0ia/toviwoxen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wuluminibopa.rf.gd/brain_teasers_puzzles.pdf
    • https://uploads.strikinglycdn.com/files/37ecd2b3-6541-44d5-b40c-98aeaf1e246b/the_red_umbrella_chapter_summary.pdf
    • https://s3.amazonaws.com/ganubatebedoxez/vobagixaxojetikus.pdf
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_2099e37e2ced4849a94ce37d4a7d5328.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9c6f7299-9eab-4e57-90ce-bbe827da1e3e/vaxurofebaw.pdf
    • https://s3.amazonaws.com/posufij/creating_an_elevator_pitch_worksheet.pdf
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_520698c91d274d94b4a0884da2e629a0.pdf?index=true
    • https://s3.amazonaws.com/pafiganovavi/dell_inspiron_530s_memory_specs.pdf
    • https://s3.amazonaws.com/vukujidor/43067723934.pdf
    • https://e012ec00-e8e8-475f-a96b-80cab2ad705b.filesusr.com/ugd/3f1139_9975d7125772472396d47c4423d7b373.pdf?index=true
    • http://xekujigifur.epizy.com/vavodiwovi.pdf
    • https://s3.amazonaws.com/kisimujuk/xufitovimetug.pdf
    • https://b24036c1-08f6-4d5b-b8c9-f4c47f26e437.filesusr.com/ugd/ae9acc_2cbf143f18304fa18406c24b10dbfb84.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_off0000e6f1.bin
3aae9ef1c94c4fb6708b40e3bb674d7848bb1391e62e6fcbab3c40ac59c5cbab
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F1 5416 bytes
font_01_sfnt_off0000f949.bin
c744ef4b4f7808afc95b6cf1391c52870496d0bdb1c73d778a3827cdbe2e61a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF949 11284 bytes