Malicious PDF — malware analysis report

Static analysis result for SHA-256 df555511a72158c8…

MALICIOUS

PDF

83.9 KB Created: 2021-03-14 16:32:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f2f689d33398ca55bd0c01368731331d SHA-1: 0fd9beb72438518cd923ada02e5f256ecb3b3997 SHA-256: df555511a72158c84d54ac49cee83be7ab8d515cfa937e7e6ef78f36b261d297
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting and acting as link farms, suggesting a phishing or malware distribution scheme. The presence of 'Gma pinoy tv program guide' in the document body, combined with the external links, indicates a lure to entice users to click on 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://resalured.ru/123?utm_term=gma+pinoy+tv+program+guide PDF link annotation
    • https://gimepaponu.weebly.com/uploads/1/3/4/6/134614910/4847246.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/vanoditobitutuza.pdfIn PDF document text
    • http://muzoc.xyz/were_the_reconstruction_amendments_successfuli40nr.pdfIn PDF document text
    • https://popupobapovuzus.weebly.com/uploads/1/3/4/0/134012290/xegusifelalokox.pdfIn PDF document text
    • https://vubupegizisave.weebly.com/uploads/1/3/5/3/135315261/pogexa_dozujejiji_zutoxorupik.pdfIn PDF document text
    • http://fajiwegoj.getenjoyment.net/58162322516.pdfIn PDF document text
    • http://kugaraginoja.mypressonline.com/29982166859.pdfIn PDF document text
    • http://6gusevshop.website/38788176611r0jbk.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/zapujibikujojux.pdfIn PDF document text
    • http://xufopizaxeto.medianewsonline.com/turipabokuz.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/gomamasiwekewiwomowagake.pdfIn PDF document text
    • https://teparapilaw.weebly.com/uploads/1/3/4/4/134477765/gegoduxef.pdfIn PDF document text
    • https://vunafenivanisip.weebly.com/uploads/1/3/5/3/135303543/resove.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rogomore.myartsonline.com/nefilezafizubofepufotobo.pdfIn PDF document text
    • http://xonolori.atwebpages.com/bakery_equipment_list_and_prices.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/3415103212.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/3d_photo_editor_for_windows_7.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/terivebanu.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_off00010a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A04 5264 bytes
SHA-256: 862e451cab42a935a3858648fac35992c078d436a4977bdbb90d9e013105328c
font_01_sfnt_off00011be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE8 11396 bytes
SHA-256: ad5fdab2a2fa515e25d85985134cf81a66b4d0433f22f82f0eeabeb1c7d3c2cd

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