Malicious PDF — malware analysis report

Static analysis result for SHA-256 77b2aa9b9bb0e25c…

MALICIOUS

PDF

85.8 KB Created: 2021-01-14 09:06:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 84d5eda5ceeb38e3f0d1b5f35460f26d SHA-1: df1aada37ee2e3b6be975d15922d433741ae15f7 SHA-256: 77b2aa9b9bb0e25cd8623f7185cea063f5c5fac844e078bca22dbb5e55938526
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to 'trafffe.ru', suggesting it's designed to redirect users to a malicious site. The document's content, though heavily obfuscated, appears to be a lure, possibly related to game cheats, to entice users to click on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://trafffe.ru/123?utm_term=palace+of+the+dead+weapons PDF link annotation
    • https://site-1177404.mozfiles.com/files/1177404/helicopter_cheat_gta_v_playstation_4.pdfIn PDF document text
    • https://jijixedo.weebly.com/uploads/1/3/1/3/131398351/nakefijesojex_jugadixuga_wapafixozine.pdfIn PDF document text
    • https://site-1178248.mozfiles.com/files/1178248/sinodizasaxiwigusefe.pdfIn PDF document text
    • https://site-1171987.mozfiles.com/files/1171987/the_greatest_rock_songs_of_the_80s.pdfIn PDF document text
    • https://site-1203447.mozfiles.com/files/1203447/77063418723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5f8efadf60548.pdfIn PDF document text
    • https://site-1168102.mozfiles.com/files/1168102/68766679571.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/lofanan-nelimodo.pdfIn PDF document text
    • https://site-1171806.mozfiles.com/files/1171806/plague_inc_board_game_guide.pdfIn PDF document text
    • https://site-1174077.mozfiles.com/files/1174077/jesabaforoduwuvozakob.pdfIn PDF document text
    • https://site-1168145.mozfiles.com/files/1168145/98359883524.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366406/normal_5fcaab4723c0e.pdfIn PDF document text
    • https://site-1178466.mozfiles.com/files/1178466/pinout_soundtrack_free_download_sites.pdfIn PDF document text
    • https://labuxodapiju.weebly.com/uploads/1/3/4/4/134492440/10a8e0c04.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F6 5240 bytes
SHA-256: a4412e1500d657d7bf77e7a7c64f521e3acc7b88aa34e2320e904623f8f42760
font_01_sfnt_off0000f8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DD 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off00010441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10441 10528 bytes
SHA-256: 9f2187174be8853e689a9c88b92ef825566165b7826022cdf13e82a9cb1634f7
font_03_sfnt_off0001284e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1284E 10096 bytes
SHA-256: 5277c482dbdd4351635c6787b9acae88b99619a75bade88fa303458197bd753c

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