Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7082676149094b…

MALICIOUS

PDF

92.8 KB Created: 2021-08-09 21:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: db8376be074c094ef60055238c621e7f SHA-1: d7057601bcd99dbc94bc168fbdf86e3879c8b216 SHA-256: cd7082676149094b9785935a9728caf1ce53df24200e8e73b3c49fda6757f4f5
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://wastran.ru/uplcv?utm_term=how+to+find+someone%27s+location+history PDF link annotation
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/914a09380e9a172f5312de370d450b90/mujamegoberumodezodiwikiv.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873f8a671fb---57914050624.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/gofijipifoxetelodanexuf.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/66363512492.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/59107bd5618b91d37bdb96107e059c5b/molaba.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/79190763091.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/refuvinogawozedesov.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///bikadajuxovuruxugibifig.pdfIn PDF document text
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zonikobubokidajozigat.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/14813471181.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ed6060d5e2d---72676223890.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/xorixemawamejar.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/zegosunuridogasebuleza.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/24ce673909d315506dbcd1388988d2e5/17732602322.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610965fd501e4---duzigijuwi.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/zofogeladu.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/44414221126.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/bevuxivuxaterivaj.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/wejij.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/74364063798.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/23720090199.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d479e507ad---zidorikoxunesefuki.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e0168f36e---82170866088.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/5457cfbfd48d2b3a8b64fe3245f8aaf9/jaxidokexakisisinixonim.pdfIn PDF document text
    • http://strandedtattoo.com/file/mumenixizoxapiwa.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3fb4c9406---jeriwuzew.pdfIn PDF document text
    • 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_off00010634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10634 10968 bytes
SHA-256: 4e0b4a985e3666028cf4025edb83292ac3fc073714fef0ed1612971f25bc01f6
font_01_sfnt_off00011f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F83 17052 bytes
SHA-256: 4c07e884f3b1f58c8329ee08bf660b7a967afbff175f26dc269ed437ee4e3e81
font_02_sfnt_off00014c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1