Malicious PDF — malware analysis report

Static analysis result for SHA-256 8114e8614c1a5242…

MALICIOUS

PDF

75.7 KB Created: 2021-06-05 05:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f2a5029eb403c94a940fb0755ff7c23 SHA-1: 5698058d5dac3a55fe2c95ebd42275f10a5aa146 SHA-256: 8114e8614c1a5242dd277a73a7486ac4deb5a4652c2e8e016d8f062e85bd07c0
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The embedded links likely serve to redirect users to malicious websites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://wastran.ru/pbw?utm_term=responsive+menu+bar+templates+free+download
    • https://narikimixak.weebly.com/uploads/1/3/5/9/135961736/povumanoxaban_sewovejumoj.pdf
    • https://sufivelogazawe.weebly.com/uploads/1/3/4/6/134600369/riberi-sovafudime-rotozu-xusobixes.pdf
    • https://dupuzebor.weebly.com/uploads/1/3/4/6/134639309/vesenaj-zopasugiwo-jimibekusan.pdf
    • https://vidokabotofasi.weebly.com/uploads/1/3/4/8/134868814/wonofosarinop_zalepomis_wulabitugomiku_naxabaw.pdf
    • https://milunuxuv.weebly.com/uploads/1/3/4/5/134529922/9fd68aed9.pdf
    • https://faxulifil.weebly.com/uploads/1/3/4/7/134731484/fukewobetetapup-jawin-setorobiv.pdf
    • https://cdn-cms.f-static.net/uploads/4481402/normal_5fd38710841d7.pdf
    • https://cdn-cms.f-static.net/uploads/4451229/normal_601aad0b57cec.pdf
    • https://gataforebulor.weebly.com/uploads/1/3/4/3/134337884/biwuke.pdf
    • https://tetabiga.weebly.com/uploads/1/3/4/0/134097499/7884182.pdf
    • https://wodokapiv.weebly.com/uploads/1/3/4/5/134584818/b195de.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feteselulo.pbworks.com/f/13780397569.pdf
    • http://nebapelamive.pbworks.com/w/file/fetch/144538179/mezilalewubezusudupojixer.pdf
    • http://xofitesu.pbworks.com/w/file/fetch/144447699/portfolio_templates_wordpress.pdf
    • https://uploads.strikinglycdn.com/files/2333b2cc-ec43-4c0d-8376-5711b7cdffac/5957051584.pdf
    • https://uploads.strikinglycdn.com/files/37291684-018c-4751-94a4-67d1d4337c69/composite_function_worksheet_answers_14-21.pdf
    • http://vazesuna.pbworks.com/w/file/fetch/144558594/best_junji_ito_book_to_start_with.pdf
    • http://povelin.pbworks.com/w/file/fetch/144421392/lixesirabusuzanasufosibaz.pdf
    • http://puzavofan.pbworks.com/f/pemuxosujugamef.pdf
    • https://uploads.strikinglycdn.com/files/ec1aa37e-3719-42dd-ad15-d106d17e57a7/87902078777.pdf
    • http://zuvuzut.pbworks.com/w/file/fetch/144577224/32260694090.pdf
    • https://uploads.strikinglycdn.com/files/c86414d5-86c7-4fb7-894a-a403875ae6e4/crosman_760_pumpmaster_owners_manual.pdf
    • http://xobapotowi.pbworks.com/f/how_to_watch_multiple_streams_on_twitch.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e888.bin
0808d00c35032bf28a93a12013b97655a25040483be688484c338ee615faee18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE888 5484 bytes
font_01_sfnt_off0000fb28.bin
3d16cc472381d120767c6572db65e7d49901597aef9f3cd720f0d4339cf840f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 11212 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.