Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc29c0073a55672…

MALICIOUS

PDF

79.7 KB Created: 2021-03-14 01:47:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6ada4b41d66abfb2c6e142b00e907659 SHA-1: c0d652c4c80daaec4fc41cb56e8ebcf2de8ccb9f SHA-256: 7dc29c0073a55672cc6b6cca81b812a4a639a14fde0f63ff695462aea76e6048
186 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable hosting services, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though partially corrupted, contains text related to printer ink cartridges, which is likely a lure to encourage users to click on the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=how+to+reset+ink+cartridge+hp+deskjet+1510 PDF link annotation
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/3797478.pdfIn PDF document text
    • http://kofojoxake.mygamesonline.org/zizabin.pdfIn PDF document text
    • https://cdn.sqhk.co/gobumavurob/aEEfxI6/dogulodezakogigoxutedade.pdfIn PDF document text
    • https://cdn.sqhk.co/xijodepub/TmHibih/monkey_go_happy_planet_escape_walkthrough_text.pdfIn PDF document text
    • https://cdn.sqhk.co/zanudiwageg/bJ32LrP/lecturenotes_2._9_apk.pdfIn PDF document text
    • https://zokelafeg.weebly.com/uploads/1/3/4/8/134889419/cf21e513fcd7.pdfIn PDF document text
    • https://cdn.sqhk.co/novupezezis/ejjhe17/andaman_tour_guide.pdfIn PDF document text
    • https://zagiwesojuju.weebly.com/uploads/1/3/2/7/132712322/nosigin.pdfIn PDF document text
    • http://kigirifaduguv.getenjoyment.net/agile_certification_questions_and_answers.pdfIn PDF document text
    • https://zoparidozuxeb.weebly.com/uploads/1/3/5/3/135390671/xekunamazamanam.pdfIn PDF document text
    • https://cdn.sqhk.co/japivuwali/hgeZhee/61653328299.pdfIn PDF document text
    • http://xorimomupajo.scienceontheweb.net/bapobunupivasegewo.pdfIn PDF document text
    • https://cdn.sqhk.co/rokogikapo/cgj6qjI/monebuxumovogof.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/8r2CnWe/snes9x_ex_roms_download.pdfIn PDF document text
    • https://gawokani.weebly.com/uploads/1/3/5/9/135993895/zisowefewez.pdfIn PDF document text
    • http://warewakeb.sportsontheweb.net/diferencia_entre_la_comunicacion_de_animales_y_humanos.pdfIn PDF document text
    • http://tofoxewesaxizuz.mywebcommunity.org/farugatajugekepuz.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/what_if_3_day_potty_training_doesnt_work.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/bokofapig/creative_writing_for_dummies_download.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/bijufexijolavefabusolamot.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/what_is_the_fuel_mixture_for_an_echo_chainsaw.pdfIn PDF document text
    • http://joberemig.atwebpages.com/25717885714.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_off0000eb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB67 5604 bytes
SHA-256: 0afc49cb83139f28d9ae3af51da2fffd5963044601aa8ec3b5fbdf646558000a
font_01_sfnt_off0000fe87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE87 10720 bytes
SHA-256: 27e358e7d812796c27c2e99d8b7a57e97c99e32f6a09e1d9794f91b245520201
font_02_sfnt_off00012327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12327 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3