Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a1f62cf74b8022…

MALICIOUS

PDF

86.7 KB Created: 2021-02-24 14:44:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 14519cad4a9e8969044d4c95a8d0b278 SHA-1: 260f34b01ebf3b9d92396974118a6f5366fba2fa SHA-256: 52a1f62cf74b802261392463c66b41f1f90a57836d41763eb6442254baf050fb
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as a link farm. The primary URL, 'https://seumenha.ru/strik?utm_term=garmin+oregon+600+manual+pdf', suggests a phishing or redirection attempt disguised as a search result for a manual. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=garmin+oregon+600+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481663/normal_601072ed98301.pdfIn PDF document text
    • http://pimuxiv.22web.org/japan_guide_hokkaido_pass.pdfIn PDF document text
    • http://prostosite.site/good_questions_to_ask_in_marriage_counselingctkcf.pdfIn PDF document text
    • http://eushopvmn.site/478752149907dy6y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485296/normal_602ebebbaf44f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5fd0a9b86df55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462986/normal_60184bb6ee80c.pdfIn PDF document text
    • http://gumimexolekedid.22web.org/in_feng_shui_what_is_the_best_color_for_a_bedroom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454045/normal_5fcae4da25fd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_60226762e1174.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452152/normal_5fcf80a45e9e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vetuvadoxawiton.epizy.com/filmywap._com_2019_hollywood_movies.pdfIn PDF document text
    • http://duwujedop.rf.gd/tricks_for_memorizing_organic_chemistry_reactions.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/51081844196.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/what_is_the_plot_of_catching_fire.pdfIn PDF document text
    • http://kukuvil.epizy.com/53181597714.pdfIn PDF document text
    • http://wiwowefitupek.epizy.com/avast_antivirus_old_version_2010_free.pdfIn PDF document text
    • http://fuxunefilat.epizy.com/vpn_unlimited_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/83197822415.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_off000115da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DA 5512 bytes
SHA-256: 8033e1a576ccf1e9ac56e58cd916236d6847584a449fb89634f9f50ab6d02fad
font_01_sfnt_off0001287f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287F 10828 bytes
SHA-256: 682fea2bcd3887b4a88c4d3cc018232e044c8e31dab4a9d27345ac2206688150

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