PDF malware analysis — malicious · bf839d1c9458379c

MALICIOUS

PDF

77.8 KB Created: 2021-07-03 14:35:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 5717cb7fb0c992ec94f752b5772bdd22 SHA-1: 83dd9e5f8119f7da87e15b79dbbbccff62887287 SHA-256: bf839d1c9458379c703cc961ae112984b745b769ca4b4627c46f7c2b03a47d52

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 0.7669

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`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`

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