Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46b119b20b3fb33…

MALICIOUS

PDF

92.4 KB Created: 2021-07-29 21:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 95a8f636455e2b23f89bda19975a1470 SHA-1: 744536f0080e12d072cc2eb54f9f7c899d9119fc SHA-256: d46b119b20b3fb33224d3392ab69c4acf18bccbcd3a10e75931ba2495271c7ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df086a4be0---lujewivaresenimadanowa.pdf In PDF document text
    • http://barudan.hk/UploadFile/file/20210702235900400.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/07fbb3a5f183b230c5cf2ca26887ff84/27066692831.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/ftfol6d7evie2o7sei4ajvjot2/gagegililo.pdfIn PDF document text
    • https://babamore.com/upload/ckfinder_temp/files/20210622010408.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/10045816270.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ijhuqth2i2e0i1nvtttgvfh311/86076315997.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c61bcb92a8---vipoto.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/bepajevokedebopuzepotigux.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/lozunifiwato.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609256fca1cb4---gekibasup.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/xolawizopiwipefimorex.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160acaa66f0099---punadufosusigudoriniwat.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/33957335918.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/49146336652.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b183f1b5fb3---4234118278.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/5544115726.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/32c75fcf05e2428501ec0bdf89b20d09/puwezijasafidakexexadubit.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/suwesezuzed.pdfIn PDF document text
    • http://kenhuffbuilders.com/userfiles/file/kafamudafagogudotu.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/zenuwinumowajujupo.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e9755d2b78c---44173206379.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/sowadirozodokowofogixodiz.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/94226895446.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=nothing+less+anna+todd+pdf+free+downloadPDF 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_off0001016d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016D 19648 bytes
SHA-256: 74b353ca98c75c400259f2444845680bc6806e97aff1213e580bc31dddf67554
font_01_sfnt_off0001321c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1321C 10840 bytes
SHA-256: 8b022480e15ecf14a3b8693e7cc78f813e2467eaa7665f5b0572cd19042b485d
font_02_sfnt_off00014af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1