Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc73a5b636ae661a…

MALICIOUS

PDF

73.6 KB Created: 2021-03-06 04:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 60d42963f8bbd1481b5a2a38a4243519 SHA-1: d585142d4e083079e96f7019490c022fd84bc4e8 SHA-256: bc73a5b636ae661a46ffe8a959fe9b047cad11107b2461f8b1e5ef233b860c52
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to 'fokemale.ru', which is suspicious given the context of a malicious verdict. The document body, though heavily obfuscated, contains text related to 'Android app development course', suggesting a lure for phishing or a scam. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/123?utm_term=android+app+development+course+near+me PDF link annotation
    • https://cdn.sqhk.co/sawibevas/jdjhvjj/15190870548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489042/normal_6032d4afa6d4f.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/how_to_tell_the_difference_between_inkjet_and_laser_printers.pdfIn PDF document text
    • https://cdn.sqhk.co/pegipoveridi/avoL2he/snake_apple_game_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/jalotenabo/ihZuSzB/heart_emoji_meme_gun.pdfIn PDF document text
    • https://cdn.sqhk.co/tekunipifob/dgghihb/kaboredurenesilomo.pdfIn PDF document text
    • https://cdn.sqhk.co/mezadisedud/djchdha/57790267258.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/48896814112.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/eOKjegi/vefejixuxiwudikoredum.pdfIn PDF document text
    • https://cdn.sqhk.co/lepitajirel/chg4ggU/cruise_line_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/gipagigo/fwgcCia/bigo_live_connector_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/hjfgfVa/tidufuxunilefeziwipar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450350/normal_601bfccc1b890.pdfIn PDF document text
    • https://cdn.sqhk.co/diwamukef/jbjgijh/debowuzorako.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/6kHhj5w/sutewavomo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404955/normal_5ff2de939f5c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikubub.onlinewebshop.net/what_is_tcp_with_example.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/aspects_of_verbs_worksheets_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/mekon.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/pujeguw.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_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 5268 bytes
SHA-256: e91a1b0fbe5feb2c2fc63183b940b5a05cdbc4c871cbed7d8c044828493c597b
font_01_sfnt_off0000f378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF378 10980 bytes
SHA-256: 59ac0d38731926f3cbe62f094f1e35b0783fbf662b76cafbbe444a5fe29fb237

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