Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f660975e0e1691…

MALICIOUS

PDF

90.1 KB Created: 2021-09-05 06:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 62324cfe516a118666350447cf5de508 SHA-1: 668a539304edb574dd9e6b40dc3cb59a3b604ae8 SHA-256: 46f660975e0e1691988e211fd1c28dc9286fa38501e9b9defd1ee06e76079b4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely serves as a phishing lure or malware distribution point. It functions as a link farm, containing numerous embedded URLs pointing to compromised websites, some of which are hosted on WordPress installations. The presence of external URIs and link farm heuristics suggests an attempt 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://wastran.ru/uplcv?utm_term=toyota+avensis+verso+2002+manual PDF link annotation
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vhrsbp1iv9n30cmmkba8a13fo3/lejexugane.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089144d48458---genumape.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/refosiki.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091aa100aceb---rudaz.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/40274008896.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/64324436063.pdfIn PDF document text
    • https://bunianco.com/other_files/File/18530226921.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/jolivenu.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/66347192058.pdfIn PDF document text
    • http://acril.ru/ufiles/files/48283536349.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/47121075528.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/14952131020.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a9d25167c---73056866042.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/74277549062.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/3943327998.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/bdmndggkmncvao6fq8dtleut6l/gaxixebapebojimomalimoda.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/e503405b3b5f1dab0c5ca4014f25aada/31859263757.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/dnhs9qt5kk18gc3s2dutn5emlr/18122673337.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/17429729865.pdfIn PDF document text
    • https://callalilyvn.com/upload/files/25907973957.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/2bhuh78sqaeknu3vv801h0fcjn/nevenevogepi.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/gaguzomaboratibu.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/mibar.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_off0000f558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF558 10756 bytes
SHA-256: 0c937f79423874337935ef8e637f26c58580476bdc13b642d8fc549bcd91276f
font_01_sfnt_off00010e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E34 19484 bytes
SHA-256: a838a6b7c3c755b6b0b1b64fbd9ad258d026db8185f0d4afb35fbc8c1a0cd2ab
font_02_sfnt_off00014128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14128 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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