Malicious PDF — malware analysis report

Static analysis result for SHA-256 072bc332614d2805…

MALICIOUS

PDF

77.6 KB Created: 2021-08-28 19:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7382a207596f94cd0cf738a58c6d0b51 SHA-1: 6646d510558f62ca153f5ec4d09de6ec066b0d4e SHA-256: 072bc332614d28056aa8548a800e19faae65a383451ab0d5901a41fd5779d091
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of multiple external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/4ed4eb2a442eafa66e3bee8cba096fd6/wamituseseredadoxekutaziv.pdf In PDF document text
    • https://bbpartner.cz/userfiles/file/fajusijodidofewanatuje.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e58f6ebe02---65449614572.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/21778768638.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/kisawesotikefu.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/mt4qk6b2qtru5qig18h5i1f7gd/12470307506.pdfIn PDF document text
    • http://darec.sk/files/files/49304541728.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/fefuwolesugavilodebutisu.pdfIn PDF document text
    • http://promador.pl/userfiles/file/18569722126.pdfIn PDF document text
    • https://thietbidienmanhcuong.com/upload/files/23878987232.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/67919133642.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4271ef47f---83135718620.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/zofavov.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607274489125d---68179919322.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c855b443f40---5003953547.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/xowelolukoxoxuvidafatewom.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/6504559b5a24af4707e9683892bcd69d/wuxixeduxonabev.pdfIn PDF document text
    • http://wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/jijazofi.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud/files/jemat.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861d9d39e4e---kotopawusu.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/nibibaki.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/jesitusexuxur.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/a67e26e3718f9770ce069e0941ef8254/lepowonoxalivaxuvad.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083432ed7756---37029704181.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/49858042596.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=cub+scout+pack+meeting+agenda+templatePDF 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_off0000ca17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA17 17144 bytes
SHA-256: 932fd29c06d8e03e2db708ef9a25aff102b6d1dc8c9ca353ca73f0f8fdf7833e
font_01_sfnt_off0000f5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DB 11120 bytes
SHA-256: 15c835a58bd1cb25046d40b2634fcaea299cf5be8560b0837475454ceccba895
font_02_sfnt_off00010f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1