Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d61d32a9cf89d3e…

MALICIOUS

PDF

70.9 KB Created: 2021-02-13 12:50:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1a3199e0c7153e6c8f6d2b977aae5b41 SHA-1: f55ec27eca457c98ed99ac6de22da663f80b6dff SHA-256: 8d61d32a9cf89d3e092f3eb2fea1dd7aaf3fd3d3c1149938d4e1ef17cc938132
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=certificate+font+adobe In PDF document text
    • https://wosutazewaxutu.weebly.com/uploads/1/3/0/7/130775331/gugofa.pdfIn PDF document text
    • http://prazdnikprosto.ru/fufigodsskh.pdfIn PDF document text
    • https://taxedomarofagu.weebly.com/uploads/1/3/1/3/131378921/5435759.pdfIn PDF document text
    • https://gawenowufiwozup.weebly.com/uploads/1/3/1/3/131383543/nasugod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414357/normal_5ff89c927b99c.pdfIn PDF document text
    • https://gadikidaju.weebly.com/uploads/1/3/1/3/131379663/219b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_60210d12b3bbd.pdfIn PDF document text
    • https://pifujikis.weebly.com/uploads/1/3/4/8/134875168/608a6717c2afe.pdfIn PDF document text
    • http://mamajan.space/dell_poweredge_t330_datasheetuz292.pdfIn PDF document text
    • https://livakazogoje.weebly.com/uploads/1/3/4/6/134622539/beturojeterum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493890/normal_60092f0150b91.pdfIn PDF document text
    • http://fevozogu.iblogger.org/abiudi_misholi_shuka_bwana_audio.pdfIn PDF document text
    • http://vorgazme.com/59634608180ive32.pdfIn PDF document text
    • https://lufojegixibebaz.weebly.com/uploads/1/3/1/4/131407324/mavenetabifuvu_monogufawetidu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wumekupewug.rf.gd/lemoxaxi.pdfIn PDF document text
    • http://xifedesekelogu.epizy.com/namita_agrawal_bhajan_odia_song.pdfIn PDF document text
    • http://rovututuxopi.epizy.com/swan_neck_deformity_vs_boutonnieres.pdfIn PDF document text
    • http://gevorewububew.epizy.com/38276759605.pdfIn PDF document text
    • http://jojomuge.epizy.com/ketekuxozide.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_off0000da87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA87 4848 bytes
SHA-256: d61f8471a3eb0ffcdb5819b34f31cfdafb7f1d9be60bfe6ba40117f9ee02eada
font_01_sfnt_off0000eb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0C 10536 bytes
SHA-256: aa554bc904895d6aaf743ac44a895c081b0dfc3459aa4a608443b6e29ec55a82