Malicious PDF — malware analysis report

Static analysis result for SHA-256 075e3e9542c575de…

MALICIOUS

PDF

71.8 KB Created: 2021-03-23 06:59:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b6f5519b3f801faa564b3736bd9a15d9 SHA-1: d63469361ccc151521fa81abf63029582c983c20 SHA-256: 075e3e9542c575de3eae526de4a3a9991604d9c43cb40238be27c956ca40e0fc
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URLs pointing to disposable hosting and potentially malicious content. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it is designed to lure users to external sites, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://lozipotod.ru/strik?utm_term=a+supposedly+fun+thing+i%2527ll+never+do+again+audio PDF link annotation
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/xejanolefu.pdfIn PDF document text
    • http://bipowilago.mywebcommunity.org/jeriromubatikis.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/logisodewox.pdfIn PDF document text
    • http://rezokivi.medianewsonline.com/66545501582.pdfIn PDF document text
    • https://gozaxuvo.weebly.com/uploads/1/3/4/6/134612917/xafasiju.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/bikekajas_xovami_jofexodi_pojetufij.pdfIn PDF document text
    • https://lazimepirurela.weebly.com/uploads/1/3/5/3/135350713/4744154.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/ghjgUZS/spanish_prepositions_of_place_worksheet.pdfIn PDF document text
    • http://bodisojanozu.22web.org/love_flames_full_form.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/aGIxmge/n64_emulator_pc_xbox_one_controller.pdfIn PDF document text
    • https://lebamemodeli.weebly.com/uploads/1/3/0/7/130776101/donevaxo.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/Mjggfjf/drag_racing_games_for_xbox1.pdfIn PDF document text
    • https://cdn.sqhk.co/nemoludajedu/ic5MgeV/rugby_league_2020_video_game.pdfIn PDF document text
    • https://vajigapevinukaz.weebly.com/uploads/1/3/4/5/134578345/xibixodud.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/cul_es_la_lnea_del_ecuador.pdfIn PDF document text
    • https://nubugudapo.weebly.com/uploads/1/3/2/8/132814946/gelevuxevofito.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/xudarat.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/netwa_pro_apk_free.pdfIn PDF document text
    • http://fuliluxu.rf.gd/how_much_oil_does_a_2015_ford_escape_take.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/67519092325.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/beep_n_go_app.pdfIn PDF document text
    • http://dizodufuxot.rf.gd/zetovovudovudenulusi.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_off0000da79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA79 5488 bytes
SHA-256: 2f59a742907298c4bad0b2fcbd3a95615107d73a02b0722eb26febbe399182fe
font_01_sfnt_off0000ed37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED37 10660 bytes
SHA-256: b838695802d8bdfd94b4b421e60d76bbfd034c4e93d9f82ac169fbf5d8fa094d

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