Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f0e4f78f4f13ae…

MALICIOUS

PDF

120.1 KB Created: 2021-03-05 11:05:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c2a70c276dc07a292d01e243ea178721 SHA-1: 590ede1679f60edd0a71296f47112f2a594e87f9 SHA-256: e1f0e4f78f4f13ae2144516d9b076a2187e91de71356522fd923773de5eb8843
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external URIs, with a primary one pointing to 'golowaki.ru'. Heuristics indicate it's a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit vulnerabilities or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://golowaki.ru/award?keyword=taylor+series+expansion+formula+proof PDF link annotation
    • http://white-x.fun/android_nougat_google_play_services_keeps_stopping1t2ff.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/e5ec58d.pdfIn PDF document text
    • http://tikovg.xyz/how_much_do_navy_seal_snipers_make_a_yearjbr8s.pdfIn PDF document text
    • https://nivebisela.weebly.com/uploads/1/3/3/9/133997547/f9c772adc86ed0f.pdfIn PDF document text
    • http://onlineeshop24.xyz/wadolanujirizedakizidmsgx9.pdfIn PDF document text
    • http://triple-doska6.club/wilanepituog6s4.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/water_slide_decals_for_furnituredoxuq.pdfIn PDF document text
    • https://wisejagu.weebly.com/uploads/1/3/4/8/134881465/mapibizipeb.pdfIn PDF document text
    • http://duplicwcnj.space/fajanodekoli7cn.pdfIn PDF document text
    • http://idealica-it.website/craftsman_yt3000_mower_deck_partslul5q.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/when_will_ps_i_still_love_you_be_on_netflix_uk.pdfIn PDF document text
    • http://mmmmmme.space/reflection_of_my_life_free_sheet_music54q6r.pdfIn PDF document text
    • http://whitetwo.space/48304896086a8tr2.pdfIn PDF document text
    • https://dafufiwe.weebly.com/uploads/1/3/4/3/134368649/9247725.pdfIn PDF document text
    • http://hayatevesigar.online/tomovuzisi5u1cn.pdfIn PDF document text
    • http://rezotu.xyz/high_sea_saga_monster_hatching_guidecihxf.pdfIn PDF document text
    • http://farozemirig.scienceontheweb.net/fudukeroniguz.pdfIn PDF document text
    • http://merishwheelrecords.com/79520748383qz4mu.pdfIn PDF document text
    • https://julavatevimire.weebly.com/uploads/1/3/4/6/134669339/nefojewute-fasig.pdfIn PDF document text
    • http://ersoil.fun/what_is_the_significance_of_222_in_the_bible1zuyf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/boccaccio_decameron_trke.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/zafedivosijuwejif.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/99145017314.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/3556828899.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000170f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170F4 5164 bytes
SHA-256: 1d8d49a41af91ea678ae927c1bbecc5281e81e80c71ffa34f288d3385b2f5b7e
font_01_sfnt_off00018280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18280 18008 bytes
SHA-256: 34b9d53a56ad48831c4e045b7b4abdfa86f4f81b8dadf38b7ed956e6301cdeab
font_02_sfnt_off0001bb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB0E 16636 bytes
SHA-256: e4c07e5a8f437b60b196d535f31ce58ace3291b676e1bc21a2074fc8cf5e48db