Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b3e78db2426d1a…

MALICIOUS

PDF

75.1 KB Created: 2021-02-13 03:37:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: caa57ad3b8e6dc72fa98d5d0a5dc6190 SHA-1: 580c7040c59cddf9c634622a4eb7526c9b252442 SHA-256: 80b3e78db2426d1a2b9f53bed98ac15cb371e636f9f90a4ecb5a587282b44b4f
166 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains embedded URLs pointing to suspicious domains, one of which is associated with a link farm and potentially serves as a lure for cracked software. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be part of a multi-stage attack, possibly involving a password-protected archive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jottigo.ru/wix?keyword=a%252B+vce+classic+apk+cracked PDF link annotation
    • http://topdiscount.pro/826908187680onu9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418175/normal_6005ebc972335.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/internet_tamil_radioswbuc.pdfIn PDF document text
    • https://cdn.sqhk.co/nawiwola/jP0RSlJ/10317423512.pdfIn PDF document text
    • http://lesantyqas.online/nafabiraronuholqc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446286/normal_5fdb03ffa01c2.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/SigjerB/8193380899.pdfIn PDF document text
    • http://coolmag.biz/best_blitzball_team_ffxj4cek.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/birivoxogugowonuzuph94di.pdfIn PDF document text
    • http://jinoxiresajigeb.iblogger.org/new_album_song_bestwap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://liwubujuwu.epizy.com/goniraripobezidumamebukus.pdfIn PDF document text
    • http://zerekigukazaja.epizy.com/27876089915.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/jaxevidum.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/al_quran_online.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A7 5180 bytes
SHA-256: 334d4787e469ba01eca54eddc7e667facd5e48593bfd8af4092e239f06b4ea40
font_01_sfnt_off0000f25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25A 1796 bytes
SHA-256: d9f96797a54aa890ffc864a62d0ee1bea369dc139b9f5922dbee51669d5f236a
font_02_sfnt_off0000fae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE6 10516 bytes
SHA-256: 1331e42802c2beb8d83caa386902f0116d3eb1c4cab2f9daec18abbd3831614d

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