Malicious PDF — malware analysis report

Static analysis result for SHA-256 8849b7842e23bc6c…

MALICIOUS

PDF

71.7 KB Created: 2021-03-21 03:21:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fa922a1376bc6a039dbe04f146fb3f9 SHA-1: 216abb0ee70ec7a932202bbd3d65484c7e9ba71b SHA-256: 8849b7842e23bc6c4ed3dc7065ccd4b93985d505b800383adf4b55fd60ccc8a8
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to 'zajinet.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/aws?utm_term=lenovo+g50-45+80e3+battery
    • https://cdn.sqhk.co/fajoliteve/igiaSig/48914779279.pdf
    • https://cdn.sqhk.co/pabefidinaz/ijgthgh/fakiratum.pdf
    • http://kefagotijuxe.iblogger.org/fasupaxuwo.pdf
    • http://sidixul.iblogger.org/tubedixawozoraru.pdf
    • https://cdn.sqhk.co/lufelumad/fOjbgjJ/fobasek.pdf
    • http://lesantyqas.online/kinetico_water_softener_brine_tank_full_of_water45wbu.pdf
    • http://tvoyoproc.fun/bjcp_guidelines_porterz2yyf.pdf
    • http://unreguezff.rest/rosufobibonorovavamijujibbab7s.pdf
    • https://cdn.sqhk.co/gojelonub/d5AibPa/1244509567.pdf
    • http://vabetovopux.66ghz.com/kekuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://disupenepoka.epizy.com/adecco_vietnam_salary_guide_2019.pdf
    • http://noxawobamuxila.epizy.com/arris_tm822g_specs.pdf
    • http://dekifovep.epizy.com/agrimoon_biochemistry.pdf
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_5704a337d44540529bda8f5699493a50.pdf?index=true
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_e800d01f6cb14373831e64d78c3ed498.pdf?index=true
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_7104cdc12d114c22b35330f525ca3fb6.pdf?index=true
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_74555f47e43e4d44a6c128a486972ec6.pdf?index=true
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_ea2e2caf670d4fb798d3c7d25826b512.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d3918287-d614-4df9-8711-6190f1728af9/how_old_were_actors_in_white_christmas.pdf
    • https://uploads.strikinglycdn.com/files/685f9334-13d7-45d9-a0d6-fb5fe0a28d60/5107541367.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d87e.bin
c863cf59501df47d9e2d6dc4c16a648d03f1c9cb67e9d2d9e7d26c970ee74a3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD87E 5632 bytes
font_01_sfnt_off0000ebdd.bin
aa06429c00709dc79bc2151319d6a83d7187b1098e1649b09f10a96e99889aae
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDD 10972 bytes