Malicious PDF — malware analysis report

Static analysis result for SHA-256 9580f40c3eebb1d6…

MALICIOUS

PDF

79.7 KB Created: 2021-04-08 10:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e35641d38da0ca222cce7995e199814f SHA-1: 26c59e4715d5158b8a8966e030792befb76f9a67 SHA-256: 9580f40c3eebb1d6949d08abfbb06b07c0022d964bab69b51c9e0a088ce33fce
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external URLs pointing to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://soxebez.ru/strik?utm_term=laho+in+english PDF link annotation
    • http://xipodijajul.sportsontheweb.net/7071637626.pdfIn PDF document text
    • https://purotuduveb.weebly.com/uploads/1/3/0/7/130738796/8744706.pdfIn PDF document text
    • https://putoluvutawubu.weebly.com/uploads/1/3/1/4/131437806/zigonosajevupivew.pdfIn PDF document text
    • https://zopodiwozexuma.weebly.com/uploads/1/3/4/7/134737972/399eacf.pdfIn PDF document text
    • https://xonidaxu.weebly.com/uploads/1/3/4/3/134319292/e89078f.pdfIn PDF document text
    • https://ruzoriro.weebly.com/uploads/1/3/5/9/135975417/1003214.pdfIn PDF document text
    • https://daxusumupazi.weebly.com/uploads/1/3/4/7/134702932/guxesaj-nuluju-kofomawut.pdfIn PDF document text
    • https://wejusapud.weebly.com/uploads/1/3/4/6/134614256/jolusesowerav.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/jfcXjiI/23521751210.pdfIn PDF document text
    • https://lafajadisevo.weebly.com/uploads/1/3/1/4/131454770/7c6e55069d27de3.pdfIn PDF document text
    • http://ripugusulufiluj.getenjoyment.net/89426256184.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/how_do_i_know_if_my_polaris_backup_valve_is_bad.pdfIn PDF document text
    • https://fazerirusabutef.weebly.com/uploads/1/3/1/3/131381144/bunomamokosexep.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/gGGAlgh/kavilulumeverofubilerof.pdfIn PDF document text
    • http://xeberul.mywebcommunity.org/88109283218.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://kitilogokufalu.atwebpages.com/how_to_cite_a_article_from_a_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c62e8e0-79cc-418a-bed1-0e78394c839c/how_to_do_literal_equations_and_dimensional_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8421781-3755-4a4b-8b52-bacbe5522094/25241000287.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/articulo_4_dela_constitucion_mexicana_de_la_salud.pdfIn PDF document text
    • http://zorikeroz.onlinewebshop.net/viper_7145v_remote_start_not_working.pdfIn PDF document text
    • http://sovogezo.atwebpages.com/8264620860.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D3 3764 bytes
SHA-256: 1a0d65acbfe609413d2cd4c943cf165b55d49423f60382cac9f2dbd471217d92
font_01_sfnt_off0000df2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2F 4500 bytes
SHA-256: 7b6f25d9794a2cdd0ec91da4bd0f2560a91a441414f4bbf2bde8d13168f45d72
font_02_sfnt_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 10084 bytes
SHA-256: ecb0c875abc907119f2a4ae6fca0a2283f108bae42a25d5d7f0ca9981a7b418c
font_03_sfnt_off0001110e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
font_04_sfnt_off00011f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0D 4092 bytes
SHA-256: f157077857095fa831bf37b4e9ccfa9982c657e74f0d84c264c80d5c4aa40ddc

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