Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebae6cd79d63a5b3…

MALICIOUS

PDF

91.4 KB Created: 2021-03-24 04:47:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f62ecca25afbfec92bc7524092a8da9f SHA-1: 222ca500caffc66bcf58a703b4089a334df3a456 SHA-256: ebae6cd79d63a5b3e905b47670e589d47030814a1c2f38b2921bd3c0e6e8c85c
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a PDF link farm. It contains numerous external URLs, including one pointing to 'jacksth.ru' and another disguised as a game streaming download. The presence of these links suggests an attempt to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=gallos+de+pelea+albany+puros
    • https://cdn.sqhk.co/lekibapufe/tjfNhdz/xbox_game_streaming_preview_download.pdf
    • https://static.s123-cdn-static.com/uploads/4393179/normal_600702d51f50e.pdf
    • https://cdn.sqhk.co/bajafigotuvi/X6u57hc/flight_world_war_ii_2015.pdf
    • https://nanavirirexam.weebly.com/uploads/1/3/4/4/134474519/rafusefijuviw.pdf
    • https://mafaredoli.weebly.com/uploads/1/3/2/6/132695491/9062d10813dceb.pdf
    • https://cdn.sqhk.co/petawelesup/jLohbIf/futev.pdf
    • http://awpmode.com/577436621587k9oc.pdf
    • https://cdn.sqhk.co/bozutebux/dghd6gg/vefovubadezumekirafefi.pdf
    • https://cdn.sqhk.co/bimolixumotu/0aKhjhd/37999057675.pdf
    • https://cdn-cms.f-static.net/uploads/4425492/normal_6026c9321285a.pdf
    • https://cdn.sqhk.co/ropobemuma/hcNhagc/christmas_wish_list_2019_app.pdf
    • https://cdn-cms.f-static.net/uploads/4501645/normal_601ad3fe8beb5.pdf
    • http://urott-hu.com/how_to_charge_xbox_360_controller_battery_packcpsqd.pdf
    • https://cdn.sqhk.co/dowufagit/RHfX9FS/gavubemafiki.pdf
    • https://jekewuvewaw.weebly.com/uploads/1/3/1/0/131070420/6173973.pdf
    • https://cdn-cms.f-static.net/uploads/4409818/normal_602c009584ffe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/bbf54c9c-07ad-4976-a991-2bd3592efbee/sukefikasus.pdf
    • https://uploads.strikinglycdn.com/files/7c6edc73-56ce-4213-b772-d256f053e796/how_to_become_a_five_percenter.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011da2.bin
bb098e5971079106f7f1c8d367d4cf531c91fa13f686a6b301a5cce6eb8524ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA2 4980 bytes
font_01_sfnt_off00012e93.bin
e15663741dcb324144b28d219b12c6d5462d1070fac7b7f4eec52bfbe2ec3273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E93 11076 bytes
font_02_sfnt_off00015275.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15275 4324 bytes

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