Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d008a07be4d5610…

MALICIOUS

PDF

92.4 KB Created: 2021-03-17 23:07:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8f10f2307627760670f3fbb7a07f27bc SHA-1: a26dfc44801492f62126dce4a64bdd50948b6225 SHA-256: 5d008a07be4d5610b7e52b1f9aaf2c6fabc187667fc66a4fc9e45ed956fcf396
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kuzutuzo.ru/aws?utm_term=pfizer+pharmaceutical+patents+provide+what+important+characteristic+that+supports+inimitability PDF link annotation
    • https://dakufosaxem.weebly.com/uploads/1/3/4/7/134771611/4245909.pdfIn PDF document text
    • https://gizajosusu.weebly.com/uploads/1/3/1/8/131856374/nesasime-minakevuku-vovavelixibox.pdfIn PDF document text
    • http://kovamuwaropepu.getenjoyment.net/how_to_format_a_research_paper_chicago_style.pdfIn PDF document text
    • https://cdn.sqhk.co/lixozimiz/idjhgic/viral_how_many_views.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/23697403393.pdfIn PDF document text
    • https://cdn.sqhk.co/buweworipoza/pjgiiXA/comics_and_cartoon_maker_mod_apk_download.pdfIn PDF document text
    • http://waystep.site/ansi_150_flange_dimensions_in_mm9sz75.pdfIn PDF document text
    • http://larts.digital/dragon_pass_application3dqbn.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/L3jjLjf/57784222742.pdfIn PDF document text
    • https://tivizaxif.weebly.com/uploads/1/3/1/3/131381605/4fa3725945.pdfIn PDF document text
    • https://kifewaremavej.weebly.com/uploads/1/3/1/6/131606874/1992029.pdfIn PDF document text
    • https://pakurematumomu.weebly.com/uploads/1/3/4/7/134764434/jezeki.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/gifetiruvum.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/gxJq0ja/kolivilurizugufi.pdfIn PDF document text
    • https://cdn.sqhk.co/kewebogi/js9NvsT/model_construction_3d_mod_apk_unlimited_money.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/warcraft_3_reign_of_chaos_cd_key_chomikuj.pdfIn PDF document text
    • https://cdn.sqhk.co/fixuzigetir/gdij4Ml/71506668228.pdfIn PDF document text
    • http://ionatr.space/funky_bay_farm_adventure_game_apknqx2j.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuzemabad/gjxPbig/lol_tft_zed_build.pdfIn PDF document text
    • https://cdn.sqhk.co/xogixute/geCqOgM/don_t_touch_my_phone_muggle_wallpaper_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojubefogugiku.onlinewebshop.net/mifuzunotowalafasotibagu.pdfIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_56dc30662ea24612aae6f757c7b3da4a.pdf?index=trueIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_800d036300fa4e938b86d8f47aa73004.pdf?index=trueIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_1a2c6a3123a247b990681eaf3d3d64f4.pdf?index=trueIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_c635212d7f694ce38f6c7324a55ff712.pdf?index=trueIn 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_off00012930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12930 5840 bytes
SHA-256: 57d81332883435c63455d5c5ab7f77efac188ee91fa2a8a1d6aca160cb4cdca3
font_01_sfnt_off00013d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D0B 11192 bytes
SHA-256: 2d8fecc96255782b4714e8abb3193e57cc4812cc6e270f32918059daba463abe

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