Malicious PDF — malware analysis report

Static analysis result for SHA-256 49eeba52ec56850b…

MALICIOUS

PDF

74.3 KB Created: 2021-09-05 05:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0891b72a0b34998085aff2098aba8363 SHA-1: 280b572df8aaed4f8930e05e5c86c5c54211017c SHA-256: 49eeba52ec56850b2fa89e3bd8aa1b626b154e3e9733233dae5cdf6943d5b49a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://garglob.ru/uplcv?utm_term=citizen+eco+drive+world+chronograph+wr200+blue+angels+manual PDF link annotation
    • http://gzky.cn/dubeite/ckfinder/userfiles/files/20210704_124203.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/e0895a598b3247b32eac9e364e3dc24a/goxogulumegokaxodepededol.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a07b853986---6006786874.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/rjpmru8dekcbnkbss80p9qtn44/papuvovovirubejeda.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/r8p1dpjfib5vf3oh2pucv3knk0/42543159859.pdfIn PDF document text
    • http://duet-czluchow.pl/userfiles/file/tikuruwefavulupigo.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/9qovorp8jm140lgg714nmcam13/81357067913.pdfIn PDF document text
    • http://nhhs78.org/clients/63854/File/96555020427.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/u5nii9320ke272pplvfgc8f2at/97632870117.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/85761850160.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/50379810426.pdfIn PDF document text
    • http://caramelitos.sk/files/23514328190.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/69425487823.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/nc1plv9gho45ikgso43q3bij8a/ponokejovamupiwivavi.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adbdebe508f---10209308035.pdfIn PDF document text
    • http://saint-party.com/media/file/milope.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/13738863798.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16092d5aba85f3---dulaluziw.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/59992002683.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/miwufazedelidokal.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/galalowexalemavagekuki.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/86928210643.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/hg2tjbrren3nqe7vrn97dp3p32/nudepexamononak.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_off0000b86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB86C 11684 bytes
SHA-256: 91fc2f51aea63f6890d235ed969b9f1d351604d5c8d8fbe3a02a85342d1c38af
font_01_sfnt_off0000d3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ebda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDA 17472 bytes
SHA-256: 7fb37d53a6cce6b65b1c4d19110b4c7c4e7dfd3581eaaf5587b3b2ea8351911a

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