Malicious PDF — malware analysis report

Static analysis result for SHA-256 28fd195853412469…

MALICIOUS

PDF

87.9 KB Created: 2021-07-08 01:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6652202814273892f11940989956aed2 SHA-1: 9e6319f4ae9c0d1719d3856c7ed9e890665786b4 SHA-256: 28fd19585341246933fbf92d8cf1fa91414b0fa46e9f56f095f8c9f5f5ccf551
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 and a machine learning classifier as malicious, with ClamAV detecting it as 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to compromised WordPress upload storage, suggesting it's used to host malicious content or redirect users. The presence of numerous external URIs, many hosted on potentially disposable domains, indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b593da90552---gamusopatisu.pdf
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/38530123300.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8f0b4288e---fewoma.pdf
    • https://privatecambodiatour.com/userfiles/file/guxovejaxifugalakiwewemiv.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa181d077f---jotoxubisakigo.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160789da7d175c---fojovib.pdf
    • https://kaktutzhit.by/uploads/files/21488983227.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160a80a53bbba1---31950490778.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dea4aafa0---49624022940.pdf
    • http://automotiveenergy.cz/userfiles/file/powudegedowagigagozodu.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b688a241324---85048230430.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/4fe6d094609cbe23d264e48167408bd3/18629545517.pdf
    • http://staresecurity.com/userfiles/file/37072283890.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/94464f2e53ab502df7eb7fc3419c8035/towujodogasafoperokaxobot.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccfbc25eb7---34092464439.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a33b7d499b9---werifibosofipalefeda.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/1pp96ooddo6fjgvd536f33uktl/94729483381.pdf
    • http://akcjonariusz.com/UserFiles/file/63483944712.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9098d6c6d---61452958840.pdf
    • https://xehowo24h.com/images/ckeditor/files/63008304318.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/cpc9c3bv6is5k43a1enobmp9e6/nenotitovajunetapiwo.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/d776b7b65d86fc9fae5c74d2806ca562/14725061334.pdf
    • http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/safekitamimizim.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/b93f27adf3da3edfee32958bd71cf77d/pavumovilopuxatibav.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=macro+to+send+email+with+pdf+attachment
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/ad7daf9b424802b1102e629c9a98bb0b/sateru.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_off0000f0c2.bin
b029f76a96a5ef0cae73f0ee901ef9c6e306111881d73a98ed63a70ed9aeaed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 10964 bytes
font_01_sfnt_off00010a09.bin
5f07cb9d9e57c66765b5b327a247adb8c1f6df1e5f67c24347d756eb69fe76fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A09 17556 bytes
font_02_sfnt_off00013818.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13818 16792 bytes

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