Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6845d96c56966bb…

MALICIOUS

PDF

146.5 KB Created: 2021-04-13 17:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 80980decfe29d7d42fd05746235d0846 SHA-1: 78c995bcb3dc1596f38023ad2216fe7ab326707d SHA-256: b6845d96c56966bb8006eda6527d36f5c9dfb065e023c993b5a35cb0db027b67
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to copy and paste content into a shell, a common tactic for executing downloaded payloads. The numerous embedded URLs, many hosted on disposable domains, suggest a link farm or distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://leonvi.ru/strik?utm_term=windows+7+bat+file+not+opening PDF link annotation
    • https://furimubabo.weebly.com/uploads/1/3/1/8/131856330/wusufomevujugakuze.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/12551998758.pdfIn PDF document text
    • https://wuduzavuvavazi.weebly.com/uploads/1/3/4/6/134618101/jowopuvopan.pdfIn PDF document text
    • https://nopiwevupemaro.weebly.com/uploads/1/3/4/6/134653234/0e44438.pdfIn PDF document text
    • https://vimugowome.weebly.com/uploads/1/3/4/3/134323071/571267.pdfIn PDF document text
    • https://runizupila.weebly.com/uploads/1/3/4/3/134320381/3697255.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxudofexal/PhjehdF/power_rangers_in_space_red_ranger_costume.pdfIn PDF document text
    • https://wekimede.weebly.com/uploads/1/3/4/8/134862148/tegepoxar-zasanef-tefiwujun-leraxukozo.pdfIn PDF document text
    • https://lololitis.weebly.com/uploads/1/3/5/3/135346836/xiwijamovovi.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/7256937.pdfIn PDF document text
    • http://pexulisinipev.sportsontheweb.net/71945465751.pdfIn PDF document text
    • https://cdn.sqhk.co/tamikoveken/pha9fja/64759650413.pdfIn PDF document text
    • https://worivoka.weebly.com/uploads/1/3/4/5/134588103/subuzeferozag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446263/normal_5fe949bec414c.pdfIn PDF document text
    • https://kavixonew.weebly.com/uploads/1/3/4/5/134592395/mulalogo_nasulezama_sipukobebomij.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/44010263038.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481825/normal_5ff116c2dfd98.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/c93a8d34024c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sufixis.myartsonline.com/31503166081.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E6F8 5440 bytes
SHA-256: 74b0b03cb1ce9a5e60ec873059377c62cbaf4a65df30590151ce85a025841e84
font_01_sfnt_off0001f9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9AA 12616 bytes
SHA-256: 260dcad21b5cbab6db79a95fc6be4efb1d6d062ef46a506d9fd496dd275ef519
font_02_sfnt_off000224d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x224D5 16088 bytes
SHA-256: 44ac041feb7ffcc486e31f6c6b08974945921949ad81072bd535323626a5d03d

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