Malicious PDF — malware analysis report

Static analysis result for SHA-256 7349e0863a894467…

MALICIOUS

PDF

86.7 KB Created: 2021-09-11 19:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 94b033fe3fcb99e6f084cf51ac800002 SHA-1: c1162b29e30a1171329ed307aa6fe6b8e54e1848 SHA-256: 7349e0863a8944675994821044a113305302e20017f63b3497090e3b87a856cf
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to websites hosted on compromised Content Management Systems (CMS) or disposable hosting. The ML classifier and ClamAV heuristic firings strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://glina-master.ru/admin/ckfinder/userfiles/files/xujagered.pdf In PDF document text
    • http://phongkhamthienhoa.vn/images/files/vutijimuzumutivugifu.pdfIn PDF document text
    • http://sswjeans.com/files/2257351992.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecf98287c3---ditajesabebipibosekobiz.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/78722132291.pdfIn PDF document text
    • https://ykitraders.com/UserFiles/file/74308097305.pdfIn PDF document text
    • http://kraemer-duennebacke.de/files/file/65941014747.pdfIn PDF document text
    • http://ck-buhgalter.ru/userfiles/file/81793842070.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161325c1cdf6aa---supulifitimelamawumeno.pdfIn PDF document text
    • http://maimungkorn.com/UserFiles/file/70473863222.pdfIn PDF document text
    • http://s4l.vn/storage/ckfinder/files/86142706806.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/93328169135.pdfIn PDF document text
    • https://rjpexport.com/files/98919967079.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff9dc3f8f4---13558280911.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/25501273787.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/fc618a30ffaaf8265df741978136ff35/70664974876.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/parapab.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/fawodowepumelexatezogike.pdfIn PDF document text
    • https://noventa.cz/media/files/file/46421622323.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/wubad.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/3565303918.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/54858848522.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/rijaxelirowepapuwi.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/24692472147.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=m4+sport+online+streamPDF 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_off0000e538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE538 10484 bytes
SHA-256: 02fa5f245a785d43bf091ca0dc3eca45cd8c294557810e393a29a27b41c3786e
font_01_sfnt_off0000fd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001151d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151D 20760 bytes
SHA-256: 07f1aa13bd4dd38d814b0674c735a91186fdb43c8e28053fd0ce43f5ffa7bf65

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