Malicious PDF — malware analysis report

Static analysis result for SHA-256 1597029b76d0e394…

MALICIOUS

PDF

83.2 KB Created: 2021-03-24 01:01:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b352a40b12a9e32db64c4cb386d24fc0 SHA-1: ea6254c4518f4fe3f6f2eee87f75f273391f3e69 SHA-256: 1597029b76d0e394b03495c3b67de2e73f94d6c0f99395bab00ee0933cb30381
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic firing indicates it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=el+factor+fred+libro+completo+pdf+gratis PDF link annotation
    • https://domazatavaxagit.weebly.com/uploads/1/3/0/7/130775902/49dcbbb4f0b.pdfIn PDF document text
    • https://cdn.sqhk.co/dedesonor/hexhigx/53882323910.pdfIn PDF document text
    • https://cdn.sqhk.co/xetokive/hdgdRMR/ranked_voting_system_in_us.pdfIn PDF document text
    • https://vomerigovelaj.weebly.com/uploads/1/3/4/9/134901888/1dccd9f559fa4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457573/normal_5fec278fa243b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480580/normal_604a261a36450.pdfIn PDF document text
    • http://lamomusexosefe.66ghz.com/nizevesomomaga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_601145cc66b72.pdfIn PDF document text
    • http://wuvudazesog.22web.org/fuvusagabi.pdfIn PDF document text
    • https://xororowikaluna.weebly.com/uploads/1/3/4/6/134643421/ximakijugexuke.pdfIn PDF document text
    • https://cdn.sqhk.co/doparibi/gghcBg7/vertigo_movie_character_analysis.pdfIn PDF document text
    • https://suruvimaweluza.weebly.com/uploads/1/3/4/1/134131456/nunomadopi.pdfIn PDF document text
    • https://dofedexakupular.weebly.com/uploads/1/3/4/3/134317333/670c347c99a246c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457573/normal_5ff5179027ef8.pdfIn PDF document text
    • https://nometiru.weebly.com/uploads/1/3/4/3/134379396/e059a71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zepitomus.rf.gd/nixirazab.pdfIn PDF document text
    • http://xisewidudulad.rf.gd/36094538926.pdfIn PDF document text
    • http://zunedolu.rf.gd/zowotijodabosirapunewiri.pdfIn PDF document text
    • http://rulenanevatetid.epizy.com/72042965222.pdfIn PDF document text
    • http://nadakenumugev.rf.gd/antivirus_avira_terbaru_untuk_pc.pdfIn PDF document text
    • http://daxarugusawo.epizy.com/arcsight_siem.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB77 5572 bytes
SHA-256: 639cf742afdc26916a2ff1469b169b99a7d6992c8a1a8f47a60f21701709e26e
font_01_sfnt_off0000fe51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE51 12668 bytes
SHA-256: ea86295019cf713fa7548da5e35898eeb212df8280509accb42408b93245bf90
font_02_sfnt_off00012807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12807 16120 bytes
SHA-256: f426976a34fdefcd81cad54404570d0f1402ab7e4df0610fb586666acad53f61

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