Malicious PDF — malware analysis report

Static analysis result for SHA-256 39691308706f3950…

MALICIOUS

PDF

80.7 KB Created: 2021-03-23 17:28:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3aa3f6cccbfbc51b509c85cfeb02d367 SHA-1: f225d8ec451b3f0b01bf7a47b9d1f94ff3a77ed0 SHA-256: 39691308706f3950e386fd267229b9c4fb2220d1b1b0a3936b1fe6670e61bf87
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm or redirection scheme. Heuristics also flag it as a link farm on disposable hosting and a high-confidence ML detection for malicious PDFs. The ClamAV detection further confirms its malicious nature, specifically identifying it as a phishing trojan. The presence of these elements suggests the PDF's primary function is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://leonvi.ru/award?keyword=lockout+tagout+program+pdf PDF link annotation
    • http://ita-bio.space/gosemotolijewekenuhmh.pdfIn PDF document text
    • http://golomashvanna.xyz/bozagixamejese46mlq.pdfIn PDF document text
    • http://mukinokelek.mygamesonline.org/mewadidagufaworeda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_6056f988491c5.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/ihqQgcE/74230739014.pdfIn PDF document text
    • https://cdn.sqhk.co/nazujovo/gjQQgff/zixenopigofamuna.pdfIn PDF document text
    • http://bbcua.site/77979551771lgfuv.pdfIn PDF document text
    • http://cafechorsu.ru/sword_art_online_gameplayp5pgj.pdfIn PDF document text
    • https://cdn.sqhk.co/tezejikibus/feidcQG/kutavufij.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/Igg9S1I/guitar_chord_chart_printable.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/ejercicios_de_mru_mruv_caida_libre_y_tiro_vertical.pdfIn PDF document text
    • http://buwovavozu.getenjoyment.net/2622887268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391305/normal_604cbc0b55431.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/best_mod_for_medieval_2_total_warcjue6.pdfIn PDF document text
    • http://macsk.space/xolori19mve.pdfIn PDF document text
    • http://goproonly.com/practically_cheating_statistics_handbook_3rd_editionkrpwk.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/UAicNdt/difiboxavu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497093/normal_5fdf04a7cafbf.pdfIn PDF document text
    • http://montana-media.com/buy_real_twitter_followers_that_retweetzgwy4.pdfIn PDF document text
    • http://majexifavel.scienceontheweb.net/wastewater_engineering_treatment_and_resource_recovery.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_604bb5de89c4a.pdfIn PDF document text
    • http://shoplus.info/stihl_she_71_electric_blower__vactu9cw.pdfIn PDF document text
    • http://serawuv.mygamesonline.org/ferulic_acid_derivatives.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/rogarikugitqvsf4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ffc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC5 5268 bytes
SHA-256: b4374dd4d8fa2fac660880d0cfa81acdd6604313356406c61033470d07c7828a
font_01_sfnt_off000111ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AC 10504 bytes
SHA-256: 346f42abd4059c3c0ea027516f8233205174b90ac59f94f23ccab00b0e5bbaf6

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