Malicious PDF — malware analysis report

Static analysis result for SHA-256 8521da7bf9306dd5…

MALICIOUS

PDF

72.6 KB Created: 2021-03-03 21:16:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8fdf4df356f1da080be2572d773c1298 SHA-1: 87eedd2ed13a57288a9e7a06a234090fc5c5b541 SHA-256: 8521da7bf9306dd5040f7fc944726ef7cc13507bac48f43ed7b1961aab781903
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=online+form+filling+jobs+without+investment PDF link annotation
    • http://nadurejiw.22web.org/99771117278.pdfIn PDF document text
    • https://sotipazokelaxat.weebly.com/uploads/1/3/2/7/132712266/pogosaxe.pdfIn PDF document text
    • https://tenubufaz.weebly.com/uploads/1/3/1/1/131164261/2f08cfbfefba9.pdfIn PDF document text
    • https://noxagutut.weebly.com/uploads/1/3/4/4/134483949/vulinuvuseken_sepusaronewumi.pdfIn PDF document text
    • https://jixepelisu.weebly.com/uploads/1/3/2/6/132695865/abb991d0405.pdfIn PDF document text
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/4b54b2.pdfIn PDF document text
    • https://cdn.sqhk.co/xogodapap/xibhbp4/football_heroes_collection.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/OialghG/spider_heroes_parkour_review.pdfIn PDF document text
    • https://bozobazevadetob.weebly.com/uploads/1/3/1/6/131607158/woligo_jutubabe_vinolakujugejap.pdfIn PDF document text
    • https://vetolotex.weebly.com/uploads/1/3/1/3/131379132/sakofeja_kudagoret_lovat_zixunizopibula.pdfIn PDF document text
    • http://potavivas.22web.org/kivoj.pdfIn PDF document text
    • https://cdn.sqhk.co/nopavoboriru/qheMOZU/m24_gun_sound_message_tone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mutuwatu/iaigget/93210650855.pdfIn PDF document text
    • https://lutavazakagege.weebly.com/uploads/1/3/1/3/131398084/773dee0ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duzebufulumaw.epizy.com/vosopugarevulefonexi.pdfIn PDF document text
    • http://lojosikol.epizy.com/gejos.pdfIn PDF document text
    • http://sebumevavu.epizy.com/cb_background_hd_new.pdfIn PDF document text
    • http://kujujigufa.epizy.com/mimakurumedoketoxixulux.pdfIn PDF document text
    • http://faxanudof.epizy.com/ppap_manual.pdfIn PDF document text
    • http://zarezelokuka.rf.gd/brother_dcp_7065dn_manual_feed_load_paper.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_off0000e003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE003 5364 bytes
SHA-256: 369214726f45a6f0676fb25b664c056dccea962d33af81cab96ddfc256b6a56e
font_01_sfnt_off0000f239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF239 10184 bytes
SHA-256: 71ed0870bc2ecfb43cb8392ff50734abe888e1f496a424ce21b87e60aab52e90