Malicious PDF — malware analysis report

Static analysis result for SHA-256 b067c00b7518795d…

MALICIOUS

PDF

76.1 KB Created: 2021-03-08 12:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 08eed8d55208490a8af4506ae9ab311d SHA-1: 9a1d2268abb9553634a852efefc8425945775664 SHA-256: b067c00b7518795d0924ac37e06a967d9a6375a560a9b09ed740e8ce8153f80e
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary malicious URL identified is https://soxebez.ru/award?keyword=funcionamiento+del+cerebro+humano+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/award?keyword=funcionamiento+del+cerebro+humano+pdf PDF link annotation
    • https://jodakinikap.weebly.com/uploads/1/3/4/3/134375895/2916100d80.pdfIn PDF document text
    • https://gaturavokig.weebly.com/uploads/1/3/4/3/134317265/sidolasuvuzizuni.pdfIn PDF document text
    • http://wafixevewitope.mypressonline.com/41080029760.pdfIn PDF document text
    • https://jitugitux.weebly.com/uploads/1/3/0/7/130740190/gefasegek-goxoniw.pdfIn PDF document text
    • https://digexuvin.weebly.com/uploads/1/3/2/8/132814990/5f96a5.pdfIn PDF document text
    • http://luxisulejoxo.getenjoyment.net/elder_scrolls_online_sorcerer_skill_tree.pdfIn PDF document text
    • https://koditagonuxu.weebly.com/uploads/1/3/5/3/135339835/surutujivorut-wutupetopuma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_bac56d12e63f4ef292ac2b96d43d3e38.pdf?index=trueIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_344ef29a2f8645648a5859b6080f133f.pdf?index=trueIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_3d3fb0154ea34ddea86941c8e89c721a.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_42cff62a447343039710fcc851f5f14e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa38876-8711-43c0-a4fe-729cc59e2883/define_invisible_hand_politics.pdfIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_b21d98e4a9d443a8976bd82dfbb020f8.pdf?index=trueIn PDF document text
    • http://xirexadugimog.atwebpages.com/gutuzapupelenazoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a409ea-34bc-41e8-a463-94bf78dbf5f5/alain_de_botton_on_love_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bdc8bb9-b980-428a-b531-678817ef7637/95492993826.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_274f7257a40b409aaf704387331893c3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7b6002-3e84-4fa0-8149-8757c1cf90ba/reposegavebigekof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a309d7-ef20-48d8-8eb1-d13868eac59f/selunur.pdfIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_a3be94271b37402db99392ea794ecbee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ffbca8-83ad-4b06-8ee4-81611bf9eb57/55189244462.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_off0000e9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C2 5312 bytes
SHA-256: 4e094b085f8bc9c70d2969e61a99b673bc93ead536a0a2f76bcaf1eaee16ff36
font_01_sfnt_off0000fba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA3 11428 bytes
SHA-256: efb0307e3aaaefbfb35b9c0ac685c87746c970f0ae45146ffe43329941f409ed