Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ed9cd20aaeccbf…

MALICIOUS

PDF

83.5 KB Created: 2021-08-09 10:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0d49e0b4e8147fed6c141a29bd9b63f3 SHA-1: 53ecf1c7e65bf8dcf0a4035d669a1e0891b7ccf1 SHA-256: e3ed9cd20aaeccbf797a539d61151d11402069c13612d30386ce8b8cb863ddc4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a malicious document, potentially leveraging embedded JavaScript for further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cructi.ru/uplcv?utm_term=emegua+amharic+book+pdf+free+download PDF link annotation
    • http://tks-forever.com/upload/2021/07/02/file/wurivitago.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/59428383463.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/69697149578.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/9d2e716ad36f6337cbdf446aec34bc92/pedasuganutuli.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/silave.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/82981171242.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/ronemewazuwa.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f838d6f633---59507530866.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/mebarofujedofape.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/60f23900ea878d7dd03ed8ca981d1365/54890220662.pdfIn PDF document text
    • http://tfforming.ru/d/files/58614716418.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/34856367687.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160726c93449b6---pelegewejotatiwife.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/61776885929.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/g5nshq5jila7jr0smv01v68b56/53614566128.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/gosamoruloduw.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6a1c3d252---47820218214.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087fa743e2eb---49374101865.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/77582367733.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e121dfef423---1383686115.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16089fe10e64dd---64411432772.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/16252401618.pdfIn PDF document text
    • http://ibb-online.ru/f/file/fuvobiromozedet.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE9 11200 bytes
SHA-256: 942b144de4d419c36d517547072551192981fadccbad893b1a0b5a3adae940ee
font_01_sfnt_off0000e57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57E 16956 bytes
SHA-256: a010443de073d7d443aeffcfff7b611c2290c733184fdc5b2f4c3d5a2101626f
font_02_sfnt_off000111f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A09 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b

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