Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6e8dc1c254b535…

MALICIOUS

PDF

76.8 KB Created: 2021-05-05 20:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 185f1179c1e59496442cb2c66b5c9429 SHA-1: 72c777a8a79a50f5bddf07ae1dbf9948ac28fae6 SHA-256: fd6e8dc1c254b5358e63f4e9701928d272cf6cc73adcd748429a4e00067ae4dd
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though partially obfuscated, appears to be a lure related to product reviews, likely to entice clicks on the embedded malicious URLs.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/strik?utm_term=danby+dehumidifier+-+50+pint+-+black+reviews PDF link annotation
    • https://pukokisawar.weebly.com/uploads/1/3/4/7/134749025/nipewizokafezeb.pdfIn PDF document text
    • https://dujodorenenap.weebly.com/uploads/1/3/4/4/134488447/4b295a.pdfIn PDF document text
    • https://luresigixake.weebly.com/uploads/1/3/5/2/135294948/rodadej.pdfIn PDF document text
    • https://bikujezojodu.weebly.com/uploads/1/3/4/5/134587809/3933455.pdfIn PDF document text
    • https://milikosepawina.weebly.com/uploads/1/3/2/6/132696406/mewinasew-pitetaxisiridim-xaxuk.pdfIn PDF document text
    • http://levitajagukog.scienceontheweb.net/how_to_add_bookmarks_to_adobe_acrobat_dc.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/abf90.pdfIn PDF document text
    • https://kizuwapeputatu.weebly.com/uploads/1/3/4/3/134375201/lugurime_mosupiwefem_vijak.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/Kipgjia/72393849479.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/id8VRel/funny_wrestling_2_player_games_online.pdfIn PDF document text
    • https://dujizajep.weebly.com/uploads/1/3/4/7/134704211/tujaxuxej.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/ieifpQ3/wedding_cake_buttercream_icing_designs.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_de518f74bbd54511ac38d94d2afeef79.pdf?index=trueIn PDF document text
    • http://suzujuvejis.epizy.com/revisojowuzojuxijiw.pdfIn PDF document text
    • https://5121d360-3808-4f61-aa44-d87cf2d9d428.filesusr.com/ugd/032e8a_f3da30805d384c7a9d0c51525e38bb57.pdf?index=trueIn PDF document text
    • http://lowuguja.myartsonline.com/85930113093.pdfIn PDF document text
    • http://gabotemoba.epizy.com/powerpoint_template_motivational_presentation_free.pdfIn PDF document text
    • http://wabalegawamiraj.rf.gd/bewiguxivanasavigo.pdfIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_864f6040db7f47aeba95157393a6264b.pdf?index=trueIn 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_off0000e10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10E 1612 bytes
SHA-256: eddd64a45c4a99fa743538512ff16f3250d57abe2872150bbd813f3204bed7fc
font_01_sfnt_off0000e924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE924 6152 bytes
SHA-256: cb7ad28103002120021a21a9614787a55d5c342c1b917e60d64922c067d4ddb5
font_02_sfnt_off0000fe09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE09 10988 bytes
SHA-256: 163f6f29530c8a245c2c1175a9bfd01a94001a2af778a5b599ba64e54b2e7ccc