Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee18e7078ce0f49…

MALICIOUS

PDF

88.2 KB Created: 2021-09-01 05:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 876ded34b0d03b17475ad9c1f513cb42 SHA-1: f496000bb25b3cf9e379a055c4ed9c46d5e30986 SHA-256: 7ee18e7078ce0f49231df6cb356524df928d9c0efe2e6f8386a99af72bf57671
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, pointing to numerous compromised WordPress upload directories. These links likely serve as a distribution point for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2091bded0---kemexonewepesiva.pdf In PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/7fa8bd57776ee7e4fd02f3a617da36ae/51545293849.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/r7nje2nbslspug3p275hsgjjt7/pogevupapekuwejotigomi.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160717c547b57d---81513322280.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/7452440f63d0d63917627177bdb59016/57958995136.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/86c4a06054c5a1876e56d6efa0da82e6/15628559129.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/4642ecf44266a3dbe6b3843ec52009e2/19669626874.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/ca82cda60494035be4444bd3b008c2d0/59344279687.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/67430572363.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/f10d0a706f0f65bce62c238ce20aea33/filegizikigezegudad.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/57639930323.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/14a43eb0fe8da1779e5dc011150c3596/jerusazuke.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071236027d46---rekivakonofukoxifutu.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084eb003f5dc---mixodelobozowigaxe.pdfIn PDF document text
    • http://phpirateboosters.com/clients/867602/File/71891866346.pdfIn PDF document text
    • http://deborahbrown.us/clients/860103/File/34015824958.pdfIn PDF document text
    • http://vipacademy.org/userfiles/file/megexejopavilexobaze.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/najekotefamajig.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16076c811c3c00---wuwakufo.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/79600166565.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612cd79db0b84---somararidoxow.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/89992679199.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1805b3a458---bamuwumapifi.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/jowurowoponepukorozuko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=kinetic+energy+of+a+spring+equationPDF 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_off0000eaa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA8 19900 bytes
SHA-256: 61f213f9101b02e8eae7c69106b3caef354231cba6329b28f3a26abf26f8f1d6
font_01_sfnt_off00011ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC0 10960 bytes
SHA-256: 76c044bb508ed48fd0fb1c13e6c1550ec2f65dc4fbfdfcc2001c5008d9d69307
font_02_sfnt_off0001380d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1380D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1