Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df34b4c04694ddd…

MALICIOUS

PDF

85.9 KB Created: 2021-03-22 05:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 577d5f63359e27bd668da00052c2b01f SHA-1: 6bb53c26110ece6f2e11cb7ba0c8982ede3f4769 SHA-256: 3df34b4c04694dddaf6f4a636b9f0ed451097943c5857e22d72b469189575e78
126 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as a phishing/malicious document. The primary malicious URL, 'https://druttle.ru/wix?keyword=physical+science+concepts+in+action+pdf+answer+key', is presented as a search result, likely to trick users into clicking and visiting a phishing or malware distribution site. No scripts were extracted, but the PDF structure itself is used for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=physical+science+concepts+in+action+pdf+answer+key PDF link annotation
    • http://dedevolopi.iblogger.org/xufaz.pdfIn PDF document text
    • http://degitowexara.iblogger.org/camp_dutch_oven_recipes.pdfIn PDF document text
    • http://xumavedam.22web.org/innocence_clothing_size_guide.pdfIn PDF document text
    • http://lerinumemikiw.22web.org/basic_french_lessons_for_beginners.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_19e0c9630f4b4b40b97fa8bc7917fd08.pdf?index=trueIn PDF document text
    • http://wivifizurata.epizy.com/sinergismo_y_antagonismo_en_farmacologia.pdfIn PDF document text
    • http://kupaxomuwekag.epizy.com/32234634184.pdfIn PDF document text
    • http://xafonabikox.rf.gd/wifafidatu.pdfIn PDF document text
    • http://piretiwojof.epizy.com/meditation_6_descartes_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/miketizok.pdfIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_970fa5d98bd041f0a321ebace5497070.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavobawum/categorical_proposition_worksheet_with_answers.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_142689da8e47496384b52cae5b01510b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/furewutimigoxukutomumi.pdfIn PDF document text
    • http://kirawijivovujej.epizy.com/the_great_society_summary.pdfIn PDF document text
    • http://suzerukudatede.epizy.com/can_we_trust_the_bible.pdfIn PDF document text
    • http://vogonadebemumox.epizy.com/2d_artist_portfolio.pdfIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_ea0ee6483c41425c9a2001b0f893fc9a.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
    • 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_off0000f998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF998 5504 bytes
SHA-256: 151101238e554a8f5590f41cf98988d7a050543a5625e10d5c17ef60085cfc48
font_01_sfnt_off00010c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C63 11908 bytes
SHA-256: a1f244e86e9b2abd8c1629c76c5addff60f9586549cb494e6959074856c7ef14
font_02_sfnt_off000134c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C5 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

Open this report in the interactive analyzer, or submit your own file for analysis.