Malicious PDF — malware analysis report

Static analysis result for SHA-256 562041676eeae780…

MALICIOUS

PDF

84.8 KB Created: 2021-04-01 07:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 501a51cd2917f080f81265ae5d10bdc9 SHA-1: 5994ec0b769fcd33926ee4a859bb934a5c376167 SHA-256: 562041676eeae7807037866405dbbf1cf42b3deb6ee23efa271dde4f555741f7
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and it contains numerous external links, indicating a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' specifically points to a large number of external PDF links, suggesting a campaign to drive traffic to other sites. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to redirect users or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://jumiwimov.ru/123?utm_term=four+lines+sheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496810/normal_5fec107db86ad.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/mitejajizide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_5fe7ed1ed5b25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_604ac778ec3c7.pdfIn PDF document text
    • https://fuzedefona.weebly.com/uploads/1/3/4/5/134578490/3825892.pdfIn PDF document text
    • http://vixegoxufareka.getenjoyment.net/active_and_passive_transport_in_plants.pdfIn PDF document text
    • http://fumexijana.getenjoyment.net/les_caprices_de_marianne_de_musset.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/yejhijd/pobawejinok.pdfIn PDF document text
    • https://gifavunebaxagem.weebly.com/uploads/1/3/4/3/134358660/kisenimikebu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485943/normal_6061f50b60e54.pdfIn PDF document text
    • https://turonobofudub.weebly.com/uploads/1/3/4/4/134463989/2159263.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/ePifgha/sevazadu.pdfIn PDF document text
    • https://cdn.sqhk.co/bipadifudame/kEMCtho/73772448926.pdfIn PDF document text
    • https://tedovuja.weebly.com/uploads/1/3/4/4/134465286/5810196.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/kakef/beyonce_coachella_performance_time.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/mcent_browser_apk_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/harry_potter_and_the_prisoner_of_azkaban_1st_edition_paperback.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/alien_swarm_reactive_drop.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/buboram.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/stickers_para_whatsapp_colombia_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/harmonize_atarudi_mp4_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/79237711036.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/crear_hoja_de_vida_sencilla.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_off00010153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10153 4400 bytes
SHA-256: 1a07d0476f571d8fb671488ca9f75717e7de65fcb46dfd4109c957492a75af9f
font_01_sfnt_off00011039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11039 11236 bytes
SHA-256: 1527657cc6f6d7a15a0f7d1e3eabffb4246ba773fa0e146f06f5b434b2538422
font_02_sfnt_off00013655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13655 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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