Malicious PDF — malware analysis report

Static analysis result for SHA-256 1743eb02cb46d25d…

MALICIOUS

PDF

77.4 KB Created: 2021-10-08 17:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 91e41e9479cd4f4ac8cd3abd40e532c6 SHA-1: f80c9e294f0b7ad2d29bc69d7ec4691f6079d4ec SHA-256: 1743eb02cb46d25d84a841b8d653de13dfef74db8bfec08c4ee5b0128adc5607
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to unknown or suspicious domains, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://e-motorcycle.tw/upload/emotorcycle/files/janawomafamepetan.pdf In PDF document text
    • https://muacash.com/webroot/img/files/63653368528.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/rarutozamusotujujebuk.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/62374379141.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/tapafixarapinejanuramorug.pdfIn PDF document text
    • https://exam12.menapoint.com/app/webroot/upload/files/32575622725.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/nimaxupevezizawexisefem.pdfIn PDF document text
    • https://hyper.oneewe.com/_img/files/gevurogofegawudaw.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/miranujigifulofomonobuj.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/35508335685.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd3134fab2---58101383749.pdfIn PDF document text
    • http://deltools.com/userfiles/file/xinud.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/95485710357.pdfIn PDF document text
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/nufuboxiribarefatobafude.pdfIn PDF document text
    • http://maxbrio.kr/files/files/37900837135.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/75931841204.pdfIn PDF document text
    • http://www.moyekolodin.com/files/64861648208.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/87766842607.pdfIn PDF document text
    • https://etadelloro.it/images/file/zawegolanedawogofaxawowe.pdfIn PDF document text
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/duwut.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-27/20210927140013845575.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=can+i+get+a+title+loan+with+a+lien+on+my+carPDF link annotation
    • 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://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_off0000ca63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA63 10740 bytes
SHA-256: 651f6772e7a7d03831c05e752ccc9702669cfabbf9d32fe7de9a2f038bf9c400
font_01_sfnt_off0000e2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 17608 bytes
SHA-256: 85277c763cf599e1aa46bc3034816bb6011b4bb137a8b5ede6bdefaa4ccb642a

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