Malicious PDF — malware analysis report

Static analysis result for SHA-256 17da67f0ca082717…

MALICIOUS

PDF

85.2 KB Created: 2021-06-26 19:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f0aa8cc662804a49604fc72a3922575c SHA-1: b08203ef3bd1592d8bf49718ad464444105542b7 SHA-256: 17da67f0ca082717a7d89802ed7476f71c60ff0d9bbcfffe0b5875d7bee5e2cf
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal that the PDF contains a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The embedded URLs are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://philabc.ru/uplcv?utm_term=how+to+start+a+tour+operator+business PDF link annotation
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/5e1d070396e84c6dccd80b200b84997e/70303155688.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/mfohcaf6bkpcudmccg87k1di2p/54739856046.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba799ab7be---janelatazakagew.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/40fqm632n12v67d8rnr5p10tsf/kumejawazi.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/30252105d3b235e3ba12412d347c73b3/55669988612.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/wigixoxug.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d49ee2bf70---nudowaxalozikebalep.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea11919555---99854086526.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/janavevebawokozo.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-26/20210526142156376120.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/26575600628.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5cded620c---9102509670.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3f53adb92---xifanifiwujunowaxado.pdfIn PDF document text
    • http://15889163.com/ckupload/files/mitegenabitilipikasuxomob.pdfIn PDF document text
    • https://ags-car.com/upload/files/mefemenemofi.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4d5db592e67268ff38e88053c17fe0f5/30752658711.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160898b74c9143---jazozibunazopo.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8eb226485---28886745802.pdfIn PDF document text
    • https://hirurgija.me//files/didibiv.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609416cfc136a---gisajinenipamodem.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/dogunotugefisewadasavuwo.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/rabufatufaj.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_off0000eb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10318 17112 bytes
SHA-256: 1d53cd54aa10b4a18325c772e762adeb32271405fde02f5a89b03823f157262a
font_02_sfnt_off00012ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFC 10516 bytes
SHA-256: 515ece5b46b71f42addc62691df72daad1f1f53cc9c85f70e28d4122b5c1eb94

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