Malicious PDF — malware analysis report

Static analysis result for SHA-256 605067fad0b36de4…

MALICIOUS

PDF

88.9 KB Created: 2021-04-30 00:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b84f9c58894ee06ed269dffd5b91b2b5 SHA-1: 7a1661af2d24d6a1e4ba65f25d2cfd9f8936a34b SHA-256: 605067fad0b36de4be58d30e73a9644ffc8ce42e0369cb69d0123846c1ff7dff
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

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://jacksth.ru/strik?utm_term=what+is+the+best+bissell+carpet+shampoo PDF link annotation
    • http://poriwesebu.22web.org/pulse_oximetry_principle.pdfIn PDF document text
    • https://luludexo.weebly.com/uploads/1/3/5/3/135322363/4001269.pdfIn PDF document text
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/jejifebumolifef-jedibolu.pdfIn PDF document text
    • http://jeruxawi.iblogger.org/sydney_funnel_web_spider_information_report.pdfIn PDF document text
    • https://tamexixufose.weebly.com/uploads/1/3/0/7/130739892/konikoso-pipifewowekow-denobulefojada.pdfIn PDF document text
    • https://mujunoba.weebly.com/uploads/1/3/2/6/132682006/biwujuvonofe.pdfIn PDF document text
    • https://musuvawe.weebly.com/uploads/1/3/4/5/134528527/240931fff.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
    • https://uploads.strikinglycdn.com/files/720bb91b-403d-4ee8-bb35-eb75851453f3/what_are_the_5_steps_in_economic_decision_making.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bbfe7ee-76c9-4b69-b38c-ccf1286e672a/dragon_age_origins_arcane_warrior_leveling_guide.pdfIn PDF document text
    • http://tereralubo.epizy.com/does_walmart_sell_cordless_phones.pdfIn PDF document text
    • http://filujade.epizy.com/chromatic_harmonica_tabs.pdfIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_b7ec9f94fdc44d2284eaae040b7623fe.pdf?index=trueIn PDF document text
    • http://xanobokapi.rf.gd/55467289782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28f24754-14c2-4b0c-be0f-27723caa929f/ropepojemutekapor.pdfIn PDF document text
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_5ea6b9ae723947b0a7d4958817c458f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5069ca65-60f0-47ce-8b2e-03bdec75e095/pefuvepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7061255-bfa0-4b67-b700-f66ffb28db7a/98186095354.pdfIn PDF document text
    • http://sabaxop.epizy.com/bemonc_2020.pdfIn PDF document text
    • http://wurunuj.epizy.com/capitulo_1b_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df617c3-40ec-40c6-b246-022abcdd52e3/zezepibarepisukeraf.pdfIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_b6c386584cb94ecbbe56ab790dd8c1a4.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAD 5008 bytes
SHA-256: 24c863831cc219ec55738291d537a1512e002f3426b2da07dff9a42bbab1b85c
font_01_sfnt_off000120ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AB 11584 bytes
SHA-256: 4b61c526e2b9bc886026d1dec375b1234ab884abb06fc582e9aaf1634f58f916
font_02_sfnt_off0001480b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1480B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361