Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e7fef88cd199ce…

MALICIOUS

PDF

99.5 KB Created: 2021-04-10 20:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8c56c42138b38465184bfe7eed2bfb87 SHA-1: 1284303de06d42242372dc5247cd2d8122ecc78c SHA-256: 34e7fef88cd199ce617371411e9a347595044504c78db2172367a8d7440b0941
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://golowaki.ru/strik?utm_term=what+are+the+two+sacred+texts+of+judaism PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374178/normal_606035825d961.pdfIn PDF document text
    • http://gativatur.getenjoyment.net/farmacos_ansiolticos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413011/normal_5ffa7c230ac8c.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/4icgfPw/werewolf_the_apocalypse_earthblood_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/lojadisexudo/gihhhTt/bixesokajoromogofijijag.pdfIn PDF document text
    • https://cdn.sqhk.co/filodomazora/e7mU41J/34272900118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478933/normal_60282b217cbb4.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/82425894242.pdfIn PDF document text
    • http://dipunag.getenjoyment.net/87949093308.pdfIn PDF document text
    • http://patedeziw.mypressonline.com/lawixufuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/1hdAmhc/lidopomexepaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/8V5Cjey/norofag.pdfIn PDF document text
    • https://cdn.sqhk.co/pavoraxebute/XifoKja/44747614803.pdfIn PDF document text
    • https://cdn.sqhk.co/fujonexa/agegfjd/zudarolewegexoripofesu.pdfIn PDF document text
    • http://rinujajija.getenjoyment.net/78331944991.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/rofavi.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/vpmTVgj/23547646680.pdfIn PDF document text
    • https://cdn.sqhk.co/nawiwola/hibpgiK/hydro_dipping_with_spray_paint_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/dabebasavus/jfhag0x/tide_chart_island_beach_state_park_bayside.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/37098507278.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/nasup.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/76595042924.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/59164799417.pdfIn PDF document text
    • http://temolujipu.myartsonline.com/carpentier_s_reconstructive_valve_surgery_download.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/19285750192.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13911 5252 bytes
SHA-256: eb52d0efc1ac82e1e3c13372ed84f8a834c8fd7b2a6f0a9c2115f66c3c5ccf14
font_01_sfnt_off00014b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B15 11536 bytes
SHA-256: 921a0edfc3db6cc0fb3761fe3d757b06b77957ebc2f66d03a9ae47a380a65f61
font_02_sfnt_off0001725b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1725B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2