Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc2189c5e889b5f…

MALICIOUS

PDF

82.5 KB Created: 2021-07-02 06:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c0e61bc2f1d47bf814fe9b40a7199ace SHA-1: b6f2cdc023dcea0b13668adc3c37acde8991cbae SHA-256: 7cc2189c5e889b5ff25e764267055b2a7621a8462005a7471625cc831553e6d5
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites and disposable domains, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with the URLs serving as the primary mechanism for user interaction and potential compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://medvor.ru/uplcv?utm_term=unblocked+running+fred PDF link annotation
    • http://hayatteknoloji.com/webimage/file/nuwomowapanodub.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f382fefd89---4165191000.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/35831071116.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/wukotabojiviwatuna.pdfIn PDF document text
    • https://ebooksweb.net/files/file/94879315603.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/pidifuwumuvil.pdfIn PDF document text
    • http://thaide.org/userfiles/file/65209161837.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fbc730444---45936040407.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160da97b9713a0---lisetajutinawuxerogako.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/82458070678.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a865bdc432a---27671157704.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/sazogobo.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/65621980397.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/36101582562.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0bc5610f3---vulaxoxijula.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/civ62fse10hnkgrrk2p49l30hs/tidafuminijomidamadiwitip.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4bb2d2c6ad---xawemizopesobiwofemutigog.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/442309b4d98f6343fb088f9409127be8/jawir.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/gajokitadal.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/fizozinamawomoxan.pdfIn PDF document text
    • http://voijin.com/userfiles/files/foxokexiwezebajebog.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/wuzosoporebenodutemeb.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160717126e9b47---duzototikijibedaripude.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_off0000e229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE229 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA40 10564 bytes
SHA-256: cd4a0cc7fd84109492ec7c561e90c935531b6cb3b5e9ea8be89ca4d80c5475cc
font_02_sfnt_off00011226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11226 16524 bytes
SHA-256: a76ce9b37c926965d69e8aef48b3b3f75095ae8673f25a92684772c9ff461968

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