Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c03746a7da3db3a…

MALICIOUS

PDF

82.7 KB Created: 2021-04-02 17:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 63398cd2d9aadae95edf47a36a832d5e SHA-1: 73a6cf1436a4ce90a371657628873bba3b035e6c SHA-256: 0c03746a7da3db3a93e5f59c6db4aeb0ec4ef879bea7bf634205cb9b776e2600
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 is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to 'Asmedia asm-106x/r sata 6g controller firmware', indicating a likely attempt to trick users into visiting malicious sites for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=asmedia+asm-106x%252Fr+sata+6g+controller+firmware PDF link annotation
    • http://bonus332.site/sunquest_1000s_canopy_tanning_bed_reviewsemm5l.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/a4L0Hej/zujugaga.pdfIn PDF document text
    • https://pazinuro.weebly.com/uploads/1/3/4/8/134895037/gajajosif.pdfIn PDF document text
    • http://dodajavux.scienceontheweb.net/vivomalufakoporamutokufe.pdfIn PDF document text
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/sinegabebavake_doloporek.pdfIn PDF document text
    • http://sabazat.22web.org/5_teori_caring_dalam_keperawatan.pdfIn PDF document text
    • http://fakosujonipej.iblogger.org/bsc_bed_application_form_2019_last_date.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/K7gdidE/australia_visa_application_form_for_vietnam.pdfIn PDF document text
    • http://allerlo.xyz/how_to_set_up_my_howard_miller_grandfather_clock8mms1.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/f5efe2.pdfIn PDF document text
    • https://fogujudusimasob.weebly.com/uploads/1/3/4/7/134713994/melufar.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/tasivojimabe.pdfIn PDF document text
    • https://wuwebiwurumebil.weebly.com/uploads/1/3/1/1/131164488/muxekiwajaderemixene.pdfIn PDF document text
    • http://tomesopinobiz.iblogger.org/45288051101.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://timojakizufijad.rf.gd/movimiento_rectilineo_uniforme_ejemplos_cotidianos.pdfIn PDF document text
    • http://delifas.epizy.com/xupetazuki.pdfIn PDF document text
    • http://pewubik.atwebpages.com/digital_electronics_viva_questions_and_answers.pdfIn PDF document text
    • http://pomababotesu.rf.gd/angry_birds_epic_mod_apk_2._9.pdfIn PDF document text
    • http://danijikuguwidak.rf.gd/mekutiga.pdfIn PDF document text
    • http://tipixerokofor.epizy.com/60667675079.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_off000103b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B6 5908 bytes
SHA-256: 29af5ea87c7c19387f26cb1785eb2ed8f6356471f4e7149ba2d75c238f290416
font_01_sfnt_off000117e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E2 11004 bytes
SHA-256: b30f1527277e43d596b0d9dbf66613ae7a7ec8bf372aa8f8d0aea2a7de0ca70e

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