Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1ed8c7b77447e8…

MALICIOUS

PDF

75.6 KB Created: 2021-03-20 18:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a6320da5065adb7135220a00b409fe78 SHA-1: 1b8a89cfd6dd687b50aae619c8c398cbc75d1ca6 SHA-256: 3d1ed8c7b77447e84b457c072a310d81dafb35642355facb680bb178ba27dcc4
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to potentially malicious sites, as indicated by the 'PDF_URI' and 'ML_NYX_PDF_MALICIOUS' heuristics. The document body, though heavily obfuscated, suggests a lure related to a 'Black diamond revolt 350 headlamp manual'. The presence of multiple disposable and link-farm hosting domains further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://jottigo.ru/strik?utm_term=black+diamond+revolt+350+headlamp+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407100/normal_601100ab93505.pdfIn PDF document text
    • https://cdn.sqhk.co/nezazexador/SjbVshf/52670875414.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/Ujegj1H/radar_mobile_speed_gun_how_does_it_work.pdfIn PDF document text
    • http://tavaxibewoposo.iblogger.org/blockchain_revolution_tapscott.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450003/normal_604ca16c680b9.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/jajhhgv/lovola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_6023c3f5c337f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413017/normal_6008e10654079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404515/normal_6046781158dd8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dipijiz.epizy.com/nosepuxibud.pdfIn PDF document text
    • http://pitowurojagit.epizy.com/businessman_telugu_movie_video_songs_free.pdfIn PDF document text
    • http://xizokokov.epizy.com/nagaxovumosilujalopabot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cc0db6e-a72d-4536-9986-d92d1aa0446b/41322528364.pdfIn PDF document text
    • http://kusikegu.rf.gd/jack_reacher_never_go_back_book.pdfIn PDF document text
    • http://fogevodazeta.epizy.com/combining_words_worksheet.pdfIn PDF document text
    • http://vawelinixafapi.epizy.com/cuisinart_dcc-2000_coffee_on_demand_12_cup_programmable_coffee_maker.pdfIn PDF document text
    • http://somupoxalinarek.rf.gd/bodyweight_workout_plan_to_get_ripped.pdfIn PDF document text
    • http://venonoval.rf.gd/online_convert_jpg_to_less_than_300kb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05080ff9-a18b-4bf9-8f33-4182e4b9bc57/becker_1981_a_treatise_on_the_family.pdfIn 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_off0000f2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E9 5736 bytes
SHA-256: 8386cc6de375621127da669b77a1302ad5d686bfca846f78a0ad88ed4b568664
font_01_sfnt_off00010651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10651 11200 bytes
SHA-256: 662055a04cc399d065165b3578d3acedbe6dcafbddf2e2243b4e053e7b795303

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