Malicious PDF — malware analysis report

Static analysis result for SHA-256 7413123aaed4f7e7…

MALICIOUS

PDF

83.2 KB Created: 2021-03-28 16:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7ab302523683390cd22ac850f5f7bfb SHA-1: 410dcae3835f474279928c0f1dee67e1ca3d7ee8 SHA-256: 7413123aaed4f7e7bc60319be75be9e7362b480d398e90fe7d72aefc8e4a3f8c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious content. It contains numerous embedded URLs, with a primary focus on fokemale.ru, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to a 'billing system project report', which is likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9666

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
  • 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
  • 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/award?keyword=billing+system+project+report+pdf
    • https://cdn.sqhk.co/jelasusoved/jchvOjz/color_maze_quilt_pattern.pdf
    • http://tehnotop.site/639849674088ppid.pdf
    • http://gejikojaki.scienceontheweb.net/lowozopefanuzabow.pdf
    • http://boomua.site/belarus_tractor_manual_onlinevq7vi.pdf
    • http://erogan-columbia.site/the_mortal_instruments_film_reviewagmpe.pdf
    • http://fejekadiwoxobiz.getenjoyment.net/1725251703.pdf
    • http://vuxilenusip.mypressonline.com/budapaz.pdf
    • http://fafikup.scienceontheweb.net/6th_grade_punctuation_worksheets.pdf
    • http://tadurarawi.mypressonline.com/zogamaxilogirupelo.pdf
    • https://cdn.sqhk.co/sekigizakeku/ijhhCgc/vuzuvexatujibad.pdf
    • https://cdn.sqhk.co/wubunepan/kibnihN/harvard_foosball_table_dimensions.pdf
    • https://cdn.sqhk.co/mozoposowi/gg6hhjj/35589523027.pdf
    • http://teenagetutor.net/84383462519eg1eh.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://wufagezigedo.onlinewebshop.net/23576059148.pdf
    • https://s3.amazonaws.com/rizezobabub/62231284938.pdf
    • https://s3.amazonaws.com/sutawowirosuvuv/folotodobaz.pdf
    • https://s3.amazonaws.com/bulikowexunepov/how_to_uninstall_graco_click_connect_car_seat_base.pdf
    • https://s3.amazonaws.com/mokixetat/yamaha_mt_03_2007_manual.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ea1.bin
42a7506dc91d6557aa938bd8ebe5fb7d4d684ca6b8a8386c351b4364f64f0cdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA1 2348 bytes

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