Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47bb4d8aa4c25ba…

MALICIOUS

PDF

67.4 KB Created: 2021-03-16 20:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: fb6a5cd7e0797adb1167cdb19b26c0b4 SHA-1: 5b8649b442cee9c03aefc8287df137adcb2554db SHA-256: e47bb4d8aa4c25ba4a6bbe8f9bd3bd43f1d611441bbe85afeac053adf69c9617
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting an attempt to redirect users to phishing or malware-hosting sites. The document body, though heavily obfuscated, contains keywords like 'worksheet doc' which could be used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=combinations+worksheet+doc PDF link annotation
    • http://dofoten.22web.org/buxijoronova.pdfIn PDF document text
    • https://cdn.sqhk.co/xotabuti/gjcF1pJ/squidward_crash_test_dummy_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/hi1gfij/84636534140.pdfIn PDF document text
    • https://cdn.sqhk.co/bivosemubo/jdhcmib/32593023999.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/Pjdjbjj/nutip.pdfIn PDF document text
    • http://kewugujijafe.iblogger.org/battle_house_full_hd_movie.pdfIn PDF document text
    • http://omynutural.space/69538340901bvoci.pdfIn PDF document text
    • https://cdn.sqhk.co/wekababu/eLty5os/shows_hd_movies_terbaru_2020_worth_watching.pdfIn PDF document text
    • http://fuwegebofu.iblogger.org/48414216402.pdfIn PDF document text
    • http://quickstore.pro/what_can_cause_more_amniotic_fluidt4d3w.pdfIn PDF document text
    • https://cdn.sqhk.co/vibesadebo/ghgj7qa/galaxy_hunter_space_shooter_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/sugojipo/jgeVWuy/wall_mount_dual_monitor_arm_with_keyboard_tray.pdfIn PDF document text
    • http://zelolugo.22web.org/28483579507.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/tFtDNhc/tuvaj.pdfIn PDF document text
    • http://gezawazerige.iblogger.org/rubut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xemefalokoxor.epizy.com/dudib.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/83851639290.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/xametoramamazarek.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/2002_ford_sport_trac_tire_size.pdfIn PDF document text
    • http://botemexake.rf.gd/graduation_certificate_template_with_photo.pdfIn PDF document text
    • http://nazonuretowu.epizy.com/go_math_book_6th_grade_answers.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_off0000ca9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9B 5348 bytes
SHA-256: 15070d25832a3d3518f6d60166a7aa2f2d125cc454806c9972e7193cc620989a
font_01_sfnt_off0000dca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA7 10376 bytes
SHA-256: 11bce10b1e696a59acd69e082807f9d2a7408ae271818859dce72daf7264e21c

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