Malicious PDF — malware analysis report

Static analysis result for SHA-256 f370aa114e4a7922…

MALICIOUS

PDF

70.6 KB Created: 2021-03-30 13:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d085796e5d3535aace915563fcb59d53 SHA-1: 1e667c6bf111814641a8df3da154524621c9215e SHA-256: f370aa114e4a7922c67fba5dd9d7e6f1df51f30341cd8847ded821d8a5c8cc00
126 Risk Score

Malware Insights

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

The ML classifier and ClamAV both flagged this PDF as malicious. The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://zajinet.ru/award?keyword=disney+animal+kingdom+map+pdf PDF link annotation
    • http://zitukuzagipu.iblogger.org/kafilomabudat.pdfIn PDF document text
    • http://iranomics.com/rt-ac87u_default_credentialshqp0q.pdfIn PDF document text
    • http://megantv.site/44889565905785sf.pdfIn PDF document text
    • https://tomosuboma.weebly.com/uploads/1/3/5/3/135382902/cb75c983d0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454052/normal_60180a97d32ad.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/aptis_test_pre_exam_workbook_download.pdfIn PDF document text
    • http://jijufopofe.iblogger.org/business_plan_espaol.pdfIn PDF document text
    • https://gebuluwit.weebly.com/uploads/1/3/4/7/134767861/gafovimo-zuzuxaja-rokojom.pdfIn PDF document text
    • http://richmaya.site/wudiluromamu3cy9j.pdfIn PDF document text
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/xexofukunodu.pdfIn PDF document text
    • https://wusiparopebabo.weebly.com/uploads/1/3/4/5/134505529/tonef-kujataz-zovibuzeperu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450347/normal_602c9069007c3.pdfIn PDF document text
    • http://tryporte.xyz/6873244630487div.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/abstinncia_de_lcool.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/10600849382.pdfIn PDF document text
    • http://zuronixo.rf.gd/55076869368.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/tetesidugumidozilinodeba.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/sowazeragapokezedugo.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/stylesheet_in_html_document.pdfIn PDF document text
    • http://duwagisu.epizy.com/mathematics_in_the_modern_world_textbook.pdfIn PDF document text
    • http://golofup.rf.gd/26314936688.pdfIn PDF document text
    • http://jutagejefutix.atwebpages.com/6th_grade_science_matter_worksheets.pdfIn PDF document text
    • http://zavulelobawabi.onlinewebshop.net/fowunelaxojagunuferit.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_off0000d4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FE 5432 bytes
SHA-256: 3a06c32cbf9d572869eafca9789296ced484abcef11d8e4ba1a480aeb007fa1f
font_01_sfnt_off0000e77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77F 10468 bytes
SHA-256: 79e95a6c5e839e01d84c12c551309a045eded04c5e24fe457cc7cd2031897db0

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