Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1460119a704024e…

MALICIOUS

PDF

98.9 KB Created: 2021-07-16 21:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10a069ca11a7993912bf2805da2cffe1 SHA-1: 4af4953e6eb62ab46bfa202b0f67e01405ea7ab3 SHA-256: f1460119a704024e223f12b3da893053ef9a332f27e214859c0229573f3f7075
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The file's structure and URL patterns are consistent with a phishing lure that exploits compromised CMS uploads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://gld-lining.com/user_img/files/1427770837.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd449ebc037---2216290373.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00ecdce9c6---poranuweluj.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071873694fd3---41237603327.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/5d2ff4c7384f44446a91f1a57ae61146/rebeji.pdf
    • http://15fratrowreunion.com/clients/2/2b/2b18ccadde375fd95e9ac2d5db5aaa67/File/6112560031.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b2ad3e02c---jazutuxikasoxurur.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/d712e5cf7105060e72c9f70fb5fc9b28/49051094606.pdf
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/68561259973.pdf
    • https://triptoboloyfoundation.org/editorsfiles/files/20855420886.pdf
    • http://fixafilm.se/userfiles/file/98210499131.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160861fcaad195---92815701456.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16081bb26dfa1e---96251926091.pdf
    • http://ahxxzx.com/userfiles/202105/file/vifarexikikadazob.pdf
    • https://andrejc.si/files/file/vamapek.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/76f4b110b194c4bc1fd3c3c4e4398088/38421669965.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6df4654cdf---bawijiralax.pdf
    • http://grandinspirations.com/clients/75274/File/jemofofonumizati.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fb91a9e26---faminevuvikimilibadomiruw.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b5d28622e---63504453340.pdf
    • http://scro.ru/pic/file/fosatu.pdf
    • https://nakipoglugroup.com/upload/ckfinder/files/85026811122.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=spiritual+changes+in+puberty
    • 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_off00011c9a.bin
6872adc7de4706d590625dfaf46b938fc722214df5db74628c0ab7a5fc454a0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9A 19252 bytes
font_01_sfnt_off00014d43.bin
d6b0a79d732e21d69b88afc9172cc86e2142acea5a91ac6dc9d81c19afaabcfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D43 10964 bytes
font_02_sfnt_off00016670.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16670 16792 bytes