Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eeb585284d8ad0f…

MALICIOUS

PDF

82.0 KB Created: 2021-09-18 21:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8274e1f25a228df6aa38cd1b987aee45 SHA-1: 65c8375cb45260c502ca97e52a7579ba4fdd0870 SHA-256: 2eeb585284d8ad0f92598fffaf57a969dd68c66b46825c227dc4353090f7794d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by multiple heuristics and an ML classifier as malicious. It contains numerous external URLs, including links to compromised WordPress uploads and link farms on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content indicate it's designed to redirect users to potentially harmful websites.

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://pistant.ru/uplcv?utm_term=try+out+hairstyles+on+your+face+for+free PDF link annotation
    • http://www.parinet.fi/tiedostot/files/47468879697.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/jubijida.pdfIn PDF document text
    • http://gucaoyun.com/uploads/file/012147162767.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/55106856106.pdfIn PDF document text
    • https://fuoriscena.eu/file/67997705669.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/28248914390.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140e52c6bdef---kovalagapu.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/gelexamalafetig.pdfIn PDF document text
    • http://paradoxine.com/upload/files/gilunamorakuxowozos.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c37e754c7d---78052340441.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/58778243066.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/jofewib.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/70pvij7ki84a74cc0jkrca3uep/varobigedipivexos.pdfIn PDF document text
    • https://breedlife.com/upload/files/vunogexobelaxerop.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/21618252252.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/93081064296.pdfIn PDF document text
    • http://moutierrozeille.fr/userfiles/file/55209542515.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/41691129906.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ee5ece5f5---kuvenarojiranazopiwoloza.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/linifipokuku.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da9e627a1d---jadejodilu.pdfIn PDF document text
    • https://jjpremiers.com/files/gujupaxobolil.pdfIn PDF document text
    • http://sibzakon.ru/ckfinder/userfiles/files/38813958378.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143de855dc34---zurivetebetakonefa.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/soremeganuponodoxej.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_off0000dc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF480 17412 bytes
SHA-256: d39159ae942a0907a4426670b54da3f7513b50cf780ce982a14a9a3c70aa2709
font_02_sfnt_off000121c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C8 10608 bytes
SHA-256: a8ce434c16a712afdbf69d1b2122ddd84a7b28c12ed9081991f592a1310c2b6b

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