Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c56c518f539bff…

MALICIOUS

PDF

84.5 KB Created: 2021-07-05 20:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2f4811087f28a38b70b9099ffd07c12f SHA-1: 4ed92de6ee3ee9eee75a38ee698a683547c164f9 SHA-256: d0c56c518f539bff0b238934acfc6bbcad871bd8b93abe8bb291d6b8893c3a70
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm for phishing or scam content. The presence of a URL containing 'fake credit card generator for onlyfans' strongly suggests a fraudulent intent. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9834

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://animalscipublisher.com/files/upfiles/file/pevidu.pdf In PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fb5f34dcb---63473450933.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/b75de9f4166eaf9db1c1980c17e96cb2/vomotufivuforerim.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/veganofulu.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/c41472f6ec9d6f3b33216aa10468a2b7/31842231896.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/jimodibasa.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc08909d5d---80050364180.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/88567821469.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/5149113649.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/229286df7d73f47902637dfc30af6408/lusatomojadudiba.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/e1012d9b844f89d2642596d61756069d/zaropezasorenoguwu.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b5beea90e---demaletewufirafudatopedu.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/7242747473.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/reduxomiwoxowawapu.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/50269814665.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/34886526071.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081f3dd2bec2---kepasejukojewawakizimeju.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/zidonarivuditibapujapal.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4ff395768---wusotujezamipagilafefu.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/2f9ed764e68d13a093e6c8c44a26efec/bewobejotalasujebot.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3b5c9a7fa---1156991660.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/ns4h3n59pk0suj53i9bgmbgmg2/9532145497.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/6jngq01ts3m0dhh6k76rqaponr/wisijapikimogag.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/sedogovuruna.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/22874167144.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609afa28c027d---nojikutavip.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/84f4d2ba7bcae388b621184051a0186d/giroxuvokiletukukilojo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=fake+credit+card+generator+for+onlyfansPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000e485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE485 10836 bytes
SHA-256: ec151a03b2632fc1b064505d2755339a07f512aed1e0a21e1156bf3b37f03822
font_01_sfnt_off0000fd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001158c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158C 17248 bytes
SHA-256: 7fdc0834fb2ea2498e707b5744b889266ac861087d08ce1d41e40874ea98062c