Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec92df4b4ace6dd…

MALICIOUS

PDF

72.2 KB Created: 2021-02-25 01:14:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3c7fb9f6f397017532bea5f83d1f106d SHA-1: 9f4708120203eb362599f0d03d34a50d4c18c956 SHA-256: 7ec92df4b4ace6dd03d08788518311a96898b96208c9cee7b65cb42b78e135c2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=kodi+krypton+apk+download+android PDF link annotation
    • https://nukanomipixi.weebly.com/uploads/1/3/2/7/132740264/1617959.pdfIn PDF document text
    • https://rifivubego.weebly.com/uploads/1/3/1/4/131407021/1f845d93661.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/134291.pdfIn PDF document text
    • http://maxovulosaxa.22web.org/how_to_use_radio_shack_pro-94_scanner.pdfIn PDF document text
    • https://vebafuxitupum.weebly.com/uploads/1/3/4/8/134890404/2690822.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://matogidujizovoj.epizy.com/20161999238.pdfIn PDF document text
    • http://wavubodalut.epizy.com/jetixenuperevosibupeb.pdfIn PDF document text
    • http://naremijex.epizy.com/png_text_photo_editor.pdfIn PDF document text
    • http://fiwusinuba.rf.gd/chest_parenteral_anticoagulation_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/85269666023.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/28795800893.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/vajukuzerajeweb.pdfIn PDF document text
    • http://wajiletum.epizy.com/sony_str-dn1040_protector_error.pdfIn PDF document text
    • http://demevobofimozu.epizy.com/xozitizewupamuwuniwasuki.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/personal_animation_website_templates.pdfIn PDF document text
    • http://fuluputig.epizy.com/digudixigavezizigarev.pdfIn PDF document text
    • http://xivajaraseb.rf.gd/jewsons_marine_plywood_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/vopidutegojoxapa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA5 5004 bytes
SHA-256: 2867905e96ffc0c4463395b1840ba76f38d12e3c964aa0dfebb3d7ed6c99fe9a
font_01_sfnt_off0000efd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD2 10576 bytes
SHA-256: 16bf868f549615e25fda5f3c1287c138c142219850c9b8ee9c8805b110df253b

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