Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e26aa2eaed3a6c2…

MALICIOUS

PDF

71.7 KB Created: 2021-03-16 03:22:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0706b27f2371bab46018f861de34bb53 SHA-1: 9b8906ea7bfea6a35ace574970fb9c5522ddfe11 SHA-256: 2e26aa2eaed3a6c2f0a3783172f071bab3a106418b8b8ecd74f012065ef49e14
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_LINK_FARM indicates the document contains a large number of external links, likely to facilitate a link farm or distribute malicious content. The embedded URL https://zajinet.ru/wix?keyword=prestige+car+alarm+remote+start+manual is a primary indicator of the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-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://zajinet.ru/wix?keyword=prestige+car+alarm+remote+start+manual
    • https://cdn.sqhk.co/pifonode/hehjcjg/rivomagurumo.pdf
    • https://static.s123-cdn-static.com/uploads/4402507/normal_5fd04aa010129.pdf
    • http://serviceforyou.site/riwemapeisvuv.pdf
    • https://cdn.sqhk.co/bulegumu/hgOjiFg/49410290624.pdf
    • http://copyrightshelpcenter.com/dymo_labelwriter_450_twin_turbo_troubleshootingl1qx3.pdf
    • https://cdn.sqhk.co/wodelaganav/9haZjgN/carrera_slot_cars_ebay.pdf
    • http://theporte.xyz/gazapuzakiven1fkt1.pdf
    • https://cdn.sqhk.co/wareberefiz/iaYrhiu/dungeons_and_dragons_idle_champions_codes.pdf
    • http://bopolubolef.mywebcommunity.org/61719019076.pdf
    • http://sluzhba1.net/how_to_become_an_auto_mechanic_apprenticewv2eu.pdf
    • https://cdn.sqhk.co/turomixo/iebKheH/download_aplikasi_b612_beauty_filter_camera.pdf
    • http://rodina38.ru/safazfzvjj.pdf
    • https://cdn.sqhk.co/xizefonuma/iQebZ42/11417694025.pdf
    • https://cdn-cms.f-static.net/uploads/4393036/normal_60208cc346477.pdf
    • https://cdn.sqhk.co/tobepeliv/iiiyP7F/6774427537.pdf
    • https://cdn.sqhk.co/tipusuzog/gejhjb4/27832121024.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fuvuvadut.onlinewebshop.net/15406685276.pdf
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_cc836cfdb3984cc0a538f28e1d7dd061.pdf?index=true
    • http://nejimafalun.onlinewebshop.net/visarifotigi.pdf
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_8bfd61adc49245269bea4bd9de1776bd.pdf?index=true
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_3d590cf3df7b4d12b496a39042f2eb3c.pdf?index=true
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_d496ae194d11478aa6334761e247c08e.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddf2.bin
5988cf9acdff82fac1daef10cd057e0843d44c4e337d350c863dac2441228ea0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF2 5120 bytes
font_01_sfnt_off0000ef49.bin
91083099cd6eccfcca1e71e655427acc437aa602b1a9727758cd278da3ae79a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF49 10032 bytes

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