Malicious PDF — malware analysis report

Static analysis result for SHA-256 9413f0bd9c1aabbf…

MALICIOUS

PDF

75.2 KB Created: 2021-09-17 19:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 092dc86060cec37dfc16a95124b380f9 SHA-1: 0343b57811d76eb2ee666027a045b18297b3714a SHA-256: 9413f0bd9c1aabbfd4b6ead44a715909a838fd16c00b7b247fa74297d3166c60
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, suggesting a phishing or malware distribution campaign. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically flags this behavior. While no scripts were explicitly extracted, the presence of external URIs and the overall structure strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://queure.ru/uplcv?utm_term=hobbs+and+shaw+gomovies PDF link annotation
    • http://thegioioto.store/upload/files/zulejegi.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/89655129087.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/2274738673.pdfIn PDF document text
    • http://djapm.com/userfiles/file/34969264463.pdfIn PDF document text
    • http://esistore.be/userfiles/file/93665526500.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/judetevolagoragosarive.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/11740816373.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/74289237080.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/defalebipojikoxepele.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/44645357622.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/492972.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/bf5a800405b3a929920c6b6925f6fba3/bexinebal.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/73945091435.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/95518903540.pdfIn PDF document text
    • https://pesonabali.dswip.com/ci/userfiles/files/ripuji.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/28263913120.pdfIn PDF document text
    • http://platcometals.com/images/file/rexatezozuletutev.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///teloviwenumevevadalodabo.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/tisimanigobu.pdfIn PDF document text
    • http://lmnn.ru/userfiles/file/66171127264.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210911112225.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/69503783982.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/kujofuwave.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://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_off0000beb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CD 10736 bytes
SHA-256: fafc5f7995d18be016328385f06f71098393cee568baa02fd7ab0825724663f0
font_02_sfnt_off0000ef0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0D 18700 bytes
SHA-256: 14256e22ad88e2a5cf2983675aa603b967dd535ce970552f555e0cbc4c1339dd

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