Malicious PDF — malware analysis report

Static analysis result for SHA-256 468054f885571910…

MALICIOUS

PDF

87.3 KB Created: 2021-06-27 02:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 50ba2b9d1e43b10c9578c3633d0030fa SHA-1: e925991e9356ec125aead7cd4a6fe482fdaa8500 SHA-256: 468054f8855719101f36b45fd4c08d298e553c77f58a9e708d96c4101499cc0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the links and the PDF structure point towards an attempt to lure users to external malicious sites, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/kbqeaa2a1n16k5ccntlkc63993/wivamobomujozixanimelera.pdf In PDF document text
    • http://hanarotalk.com/userfiles/file///69540323680.pdfIn PDF document text
    • http://scottleddy.net/clients/862555/File/xugenusamerugutoxagudunew.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/8b8ljsg83kr7rgm5269ndfgkem/5897415487.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b02e1418017---wedirosuzun.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/13601752197.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/topakulinogirobetawurisos.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5ab343a7e---gowibawopobumozison.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/bg637uvmbd4vh7l6eocfpihep5/21448664383.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/vewaguborasajarem.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/9925297934.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1bf52a3c6---ziwaxufetopakirawikitete.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/bapesalamexubul.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/gulejid.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/faxazedenimazegavewiwa.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/lexukanugirerax.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b342c428089---manasa.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d75a0b59c---33637920159.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/tazavimaxagezosofij.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbba2ca16a---92656307319.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f930160a2---26972260270.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/h3mp81oood5fsfrd2n1kf1smjo/noxagunivodivosanuriju.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/21648526096.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/62785706065.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/75223895696.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=syncope+side+effectsPDF 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_off0000f3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0E 16736 bytes
SHA-256: 587c09c47b1b7560f2fe86412df0fe051ba4defa5913168fc002ac5e375fdaf4
font_02_sfnt_off000137bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137BF 10496 bytes
SHA-256: 33c8bd5368ee6f139b67424203aeac4790ddf3aab8f8dc050e2e4f25fc0d4c72