Malicious PDF — malware analysis report

Static analysis result for SHA-256 6314aecf1454a7a3…

MALICIOUS

PDF

82.4 KB Created: 2021-09-21 03:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7bd610ee144ffcae357ebd22b85080c4 SHA-1: 9366a6be4c99fe08a6de753085a16bf140f74c65 SHA-256: 6314aecf1454a7a31080b263629f24e993aa926f05accb6f92b0346a806b4355
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://queure.ru/uplcv?utm_term=transfer+file+to+sd+card PDF link annotation
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161444e6807c8c---wurewijezefizatebozurir.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/38197527237.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/jozireserigog.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/161383324206d5---26847246319.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/71521455307.pdfIn PDF document text
    • http://skidubravy.sk/spravca/ckfinder/userfiles/files/meruzube.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/nuseweriwexel.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/lgouinh1sfurhkoroici8ibeuc/63659039066.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c56d9e5673---79131859811.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/32354233670.pdfIn PDF document text
    • https://vleek.com/uploads/files/9508000329.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/4099179591.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/nuluxa.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/29887377347.pdfIn PDF document text
    • https://asi-filter.pl/files/file/laxedinuje.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/25435896935.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/baferapefetadazudupewus.pdfIn PDF document text
    • http://steinbach.casawell.tw/userfiles/file/wexepu.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/woxotuv.pdfIn PDF document text
    • https://dolphinsolutions.net/ckfinder/userfiles/files/60280366474.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/71907399116.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/zapojatevurazajinud.pdfIn PDF document text
    • http://thomas-zigon.de/images/file/funozowaka.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/dekefe.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_off0000df51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF51 17232 bytes
SHA-256: 141787f43c266ac201bf43964d27ee806a539b14b7cbea2b8d53fe61de19c3d0
font_01_sfnt_off00010c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C10 10432 bytes
SHA-256: 3bc0174ee5120eef4a19464476e7065bc7d1dbc889dff1047f948a35b10c48d1
font_02_sfnt_off000123d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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