Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c3cff3fc3c074e…

MALICIOUS

PDF

90.2 KB Created: 2021-06-30 02:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 05f1ad143b0c3a83e6f76d25c6cb641e SHA-1: 25a80e70f77b641cf8e852eaa2cae342c738b5c5 SHA-256: 06c3cff3fc3c074ed5894f26ef925e68efcfccc1c3a3b5ca30b911cf68789d5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that likely lead to phishing sites or further malware downloads. The presence of multiple links on potentially compromised CMS upload storage and disposable hosting suggests an effort to obscure the true destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://cructi.ru/uplcv?utm_term=a+practical+guide+to+marital+bliss+pdf
    • http://inarchengineering.it/userfiles/files/64195794887.pdf
    • https://nepalmicrofinancesummit.org/userfiles/files/mijuvux.pdf
    • http://gleneaglehoa.org/images/file/2304425199.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5491f2569---99322388245.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/c419e36464b5c151c89c003900fcb2e6/jilatumafar.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/i43259jfklhncetipdll3i4f8s/3457182612.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bee9de7525b---92014645888.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078c29776460---sonofimofetopojogo.pdf
    • http://ed-web.cz/userfilesfile/rekabojosugar.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/2fc44722fe60678bed5aacd4af810dd6/76363263137.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d89bb1ed5ca268ad5e34f44111d1f075/83013516794.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee55d5c86f---55151619795.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16077de9cd4f4a---fodelepukixutigupuk.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079570ed41ca---16221054738.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d7ff3d9cdaf---bikoxetixi.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/dbb9ef68fb54fca88bb28e9a3ae4791f/54572748060.pdf
    • http://peaceinsrilanka.lk/userfiles/file/6858249070.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/fu48fut2c3n3o7pr6ovjcqivsd/kawekedemajibopit.pdf
    • http://industrialdevices.in/uploads/jivunux.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/33c692c80a85b46f4ed9c13b7bf2377b/92369141718.pdf
    • https://efnnma.org/files/file/muwoxezewiranati.pdf
    • http://saltokisport.com/uploads/files/degoxetigutozedu.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/a2ad6c99735a0d5a7e5bb81c50858d46/71038563760.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/ded437114e5c3742af392d2317510248/nasameduvik.pdf
    • https://itracmediav5.com/ckfinder/userfiles/files/5650853999.pdf
    • http://richmore.kr/uploadfile/fckeditor/file/zivugiwibuxigor.pdf
    • https://starbox.fr/img/files/robisisivevutuwopes.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_off0000f740.bin
40b9140e627092e994f3a90406dd6d72c44ac92c790ee200a7b26d9ea3c8c96d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF740 11080 bytes
font_01_sfnt_off000110b5.bin
1a516d1c6073c160fbc4ed77ae8e56c74dcddb2d129c3a22ea6040ce05e7216c
pdf-font-stream PDF embedded font (sfnt) at offset 0x110B5 19908 bytes
font_02_sfnt_off000142e8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x142E8 16792 bytes