Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eed9a97bd75b401…

MALICIOUS

PDF

81.0 KB Created: 2021-04-06 14:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 60d716595c025f9a028087df26a3f8e1 SHA-1: 704b2480bad50a23caf041b67f477d6ea2ccfefa SHA-256: 3eed9a97bd75b4017161fbbee03864a136f6500695ea7f512360d475744782b6
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=murder+on+the+orient+express+1974+plot+summary PDF link annotation
    • http://tezijexipilimo.getenjoyment.net/84475166041.pdfIn PDF document text
    • http://bonaletikireje.iblogger.org/evermotion_archinteriors_38.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/iihbEje/vitugikekorezuxagugejakip.pdfIn PDF document text
    • http://lufijep.iblogger.org/algorithms_of_oppression_book_club.pdfIn PDF document text
    • http://lewulumotuf.iblogger.org/nuxusifupoganezajaz.pdfIn PDF document text
    • http://memaberenux.scienceontheweb.net/cumulative_distribution_function_to_cdf.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/56184064441.pdfIn PDF document text
    • https://cdn.sqhk.co/xinovupu/Edjjjhh/midalutipogabojuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/Bjfhhhb/maxpreps_colorado_softball_scores.pdfIn PDF document text
    • https://cdn.sqhk.co/bawevabob/eibjb5R/11434171172.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/EjbmibG/65365686693.pdfIn PDF document text
    • http://rapoxarawiwalo.sportsontheweb.net/functionalist_theory_of_education_strengths_and_weaknesses.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/hLigche/pokemon_let_s_go_eevee_gym_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/kapideto/wuyQjgV/cake_decorating_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wovoruvuluriba.epizy.com/57650192568.pdfIn PDF document text
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_690df14676104429adaa446b33d010eb.pdf?index=trueIn PDF document text
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_4761d1195e0e468195da9e161d6da2cd.pdf?index=trueIn PDF document text
    • http://nozanela.epizy.com/aldous_huxley_un_mundo_feliz_pelicula_completa.pdfIn PDF document text
    • https://849cba27-c1c2-4801-a47f-514a08c45c3c.filesusr.com/ugd/7f7a2c_9d546f0b427344748aeaf1d023d29853.pdf?index=trueIn PDF document text
    • http://pujumek.myartsonline.com/how_to_set_the_analog_time_on_a_g_shock_5146.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_off0000fd01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD01 5752 bytes
SHA-256: adfbebd3565c2a7ec626727c26c921fde75b9cbb31d91667d5f603947c066260
font_01_sfnt_off00011093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11093 11212 bytes
SHA-256: 3035cef7712caa6a2e985f7e7953aebfe1cac89a25eed696d8948d5d91bc40a0

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