Malicious PDF — malware analysis report

Static analysis result for SHA-256 332e79ea3a1d1fb3…

MALICIOUS

PDF

78.6 KB Created: 2021-02-22 22:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a15933c9a750d47ab42980a24a6221bf SHA-1: 716f24c197fd6946bb60f528c0fa7f8c48d3ab9e SHA-256: 332e79ea3a1d1fb30ffaa383bc881e5b0b0c42048b145ccca22ebe655b3dd082
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery. The presence of multiple external URIs and the link farm heuristic point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/123?utm_term=nightwood+djuna+barnes PDF link annotation
    • https://bixavovene.weebly.com/uploads/1/3/0/7/130775743/74ec19b5b98b40e.pdfIn PDF document text
    • http://greenbike.shop/tammara_webber_easy_epub_download5fov1.pdfIn PDF document text
    • http://slamelina.website/57237284172jfd7u.pdfIn PDF document text
    • https://zuxusesomopekem.weebly.com/uploads/1/3/5/3/135305840/b986f18ef3aae95.pdfIn PDF document text
    • http://begdas.fun/amuchategui_derecho_penal2mlzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467318/normal_602f68cc68286.pdfIn PDF document text
    • http://hot-money.fun/8471767995451wyi.pdfIn PDF document text
    • http://mebelrostov.ru/singer_heavy_duty_4423_review16puu.pdfIn PDF document text
    • http://uber-global.com/lideromopesujozezslb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481985/normal_5fd158c232dc5.pdfIn PDF document text
    • http://thesimplycompleteseries.com/32926783133p511b.pdfIn PDF document text
    • https://lafotavesa.weebly.com/uploads/1/3/4/6/134633764/5532727.pdfIn PDF document text
    • https://vujilesozigo.weebly.com/uploads/1/3/4/0/134042384/bilaribelubeseloboma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385631/normal_5fee8a47d7541.pdfIn PDF document text
    • http://itanah.space/vejawarexajuzovn69v6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://notisazuzu.rf.gd/raritopi.pdfIn PDF document text
    • http://reronagut.epizy.com/yumetourou_piano_sheet_music.pdfIn PDF document text
    • http://kitasavino.epizy.com/yenthavadu_gaani_naa_songs.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_off0000f50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50A 5332 bytes
SHA-256: b78bed82ba8c975c99f3f677111057ecc7c931930e43d4e0434c7dda6f9b0226
font_01_sfnt_off0001073c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073C 11160 bytes
SHA-256: 07e422ea9f8bda93efc258ca6b5392ae8de87c885c908aa53f9aa41e415bbd94

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