Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d7744bd9e720eb7…

MALICIOUS

PDF

80.4 KB Created: 2021-07-03 14:35:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f225b803eb151ef6adfd07d227e5c1b8 SHA-1: ca2c1564afd0b88247371d4cdc2194dc5ff0616e SHA-256: 8d7744bd9e720eb75a2d55a6eef68055fe8d9fe7ccceeb83b53111c97319b6e9
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The document functions as a link farm, with numerous URLs pointing to compromised CMS uploads, likely intended to host and distribute further malicious content. The presence of external URIs and the overall structure suggest an attempt to lure users to external sites for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6790

Heuristics 5

  • 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
  • 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://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb4bc34ba3---12375849027.pdf In PDF document text
    • http://schodylux.pl/userfiles/file/pexasowuwajikadokopetudo.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607974f0e2e72---52367554286.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b64631de3---83253369254.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/ffb0bd1eb9336a07a02171925d8c01c7/17074340499.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/70630419312.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/755f9592677312b716385c048b13b269/14794270371.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/5de87c5fb2c15eabc8525d24c8c3c54c/wamokujimiri.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607778b490cdf---90231665569.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/53128175406.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c214b3572---lozijojera.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021062017243773499.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/954a45058eb17f311d3584427e41af46/robedabepirafuninofukudi.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/29040b21207d45d2e4e94b5985366999/rajopapejidefalefi.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b297775c60b---38416605164.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/6bfe8a51073ce359a254265899c6ff5e/63416023352.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093b75da2d0a---fubaguzifipozate.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/pqn9rl2mes6fcc5p2iqpjccvv3/87760328456.pdfIn PDF document text
    • http://anma.pl/anma_edytor/file/24929383730.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/23358215060.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/kujeduwirawomigof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=too+young+to+be+married+the+holliesPDF link annotation
    • 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_off0000e88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88C 17176 bytes
SHA-256: 4c3c2f4681190d6647eed7fb85ec23ed53195b797248a6b81467cb1ecd2193cc
font_01_sfnt_off00011555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11555 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6C 11012 bytes
SHA-256: e17e0b8f47ce1357409f7a98b0f4f3a5faa7e3172f87619720fcd71d6e13173e