Malicious PDF — malware analysis report

Static analysis result for SHA-256 003455be926857d5…

MALICIOUS

PDF

100.3 KB Created: 2021-07-07 03:34:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce74f367ed11edd2594a8cecc7f26b44 SHA-1: 931eefc97058744b273022e0793ae9b7e89003c2 SHA-256: 003455be926857d515554440914a0148ba02317397b7ccf83307d71f90f36e49
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and other disposable hosting sites. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://drafthe.ru/uplcv?utm_term=eating+an+apple+a+day+for+a+month
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/39257564421.pdf
    • http://innotack.com/userfiles/files/98623882746.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/0b4c01ebce26703c68641bf98c06c04c/69694980227.pdf
    • http://phutungtdc.com/upload/files/zojorebuvofenexopivu.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dc0a5658937---41345336334.pdf
    • http://selfmadefilms.nl/userfiles/files/98299280738.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/97a16e25c583607ce06130289e877bca/86647432085.pdf
    • http://birzebbugastpetersfc.com/files/file/filufuvova.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/d6df49af46ac5b9c5d5594dbb2cfac07/13263469731.pdf
    • https://fullmagicweekend.com/ckfinder/userfiles/files/79292806649.pdf
    • http://villa-carlshorst.de/sites/default/files/file/85047862230.pdf
    • http://ahcxdq.com/uploads/file/022347577779.pdf
    • https://aronabritcan.com/userfiles/file/merifevijakugakanazijo.pdf
    • http://www.jobsincrete.gr/images/_user_na/file/13350452463.pdf
    • http://sl-light.ru/design/img/upload/file/julefevetolora.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/h4aobmpegvi83jpd78dk3mvnv2/53429950688.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/8f5937aa591a64acd206af3de7b0bc28/wibujagaxigemome.pdf
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/silam.pdf
    • http://bigxra.com/uploadfile/file/2021062110113573499.pdf
    • http://outspokenholland.com/userfiles/fckFile/20210623164307.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/vipotavimewujapukok.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071dcf3a5170---varemeletusavejesiwera.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2cbe483ac---31527943077.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001267e.bin
8b1f3016e4b2f63b2bbd36eb7374bddbe7df025dc28f5f7eb8ef28c91004f8a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1267E 10876 bytes
font_01_sfnt_off00013f27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F27 16792 bytes
font_02_sfnt_off00015739.bin
73d426df8ad885b48e00b5b8cdaabbcfc81f34a558b4ecaa910499a59695025d
pdf-font-stream PDF embedded font (sfnt) at offset 0x15739 17220 bytes