Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27fcadd833f4756…

MALICIOUS

PDF

81.9 KB Created: 2021-08-26 05:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8adf3636d59428dd12dc138ece217d5b SHA-1: f6c56291ddd40e5989e255a15f50fc22fb8c9a42 SHA-256: c27fcadd833f47562fb4c85790d2783d91e7941376d2a7fef53c9250ac00faa7
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious sites. The presence of external URIs and link farms indicates an attempt to lead the user to a compromised or malicious domain, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://a1-recruitment.fr/v2011/Files/fck_upload/file/dipedamejogona.pdf In PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/ib1ejg8pnp37p1r95bi7trp2q7/sefumotifutezazaxeve.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/13cd5ee2ab9f13db17a4834d2757d26a/6054029777.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/kefowiwoxogoneto.pdfIn PDF document text
    • http://bamila.vn/luutru/files/defofuxeviwosev.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d314c671968---98891070111.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/mijilavowigidil.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///nibetewenofejozojetabewol.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/ef9b8dd084b1b570f4e5c94da63e364e/39170431000.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/5153058185.pdfIn PDF document text
    • http://taitung-house.com/CKEdit/upload/files/36141738304.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16102d5a232cd5---43298759597.pdfIn PDF document text
    • http://4bzsoftware.com/Images_upload/files/14371175454.pdfIn PDF document text
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/40980357775.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/dojopolaxemilalawubirazin.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/38797641760ac1cbd67ff8.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/42110830828.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/34419904299.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1610ca19f84470---rapubemigakologukena.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/bogoxujusurajalini.pdfIn PDF document text
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/xikizegusifexitepu.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/butukurudadazawemodeguzen.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/4468c2b3d70bcc70053169a5855f61b0/tekapuli.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f55900247---vusimowebirubusaminures.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=spindown+dice+binding+of+isaacPDF 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_off0000d611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD611 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE23 19828 bytes
SHA-256: a84ded121aeef91bc0abf4051e514d66e87428e3e0ff13e1053d8ae56965f341
font_02_sfnt_off00012060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12060 10852 bytes
SHA-256: d99788d36c2b8fc4f43e11deee68b7772fe84e049008c1715a120a125c769da9

Open this report in the interactive analyzer, or submit your own file for analysis.