Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c95490bb6e115ac…

MALICIOUS

PDF

89.6 KB Created: 2021-08-08 02:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2e3a8985ac5ff8e90e7950fecd4b3e16 SHA-1: dcd3c8b71a18898cebcc074fbbf0cbd9bac5c02a SHA-256: 0c95490bb6e115ac1b7bf3102774be8d0a5fe583f99259c0ee44b7afb40cad4d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing users to numerous external URLs, many of which are hosted on compromised or disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fedico.ca/upload/editor/file/dapotivesufofudodurozimuz.pdf In PDF document text
    • https://hijaulumut.com/contents//files/91442382090.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210628033343.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/264c7dc08b1b1d51f66c900e49bddaf1/68522910797.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/13730862758.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/38972176578.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/jfhqoiaie7m1tkfqnfvfeuevgi/40139496156.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/66a2776b513706263e8caafa8bad0e6b/58753498330.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/dbgmggbjg6e3akb40usq2brqn4/90518515930.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608816ade07a6---fowoxulubikaka.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/e4bd3e103916f501f313202952a834c4/86375691129.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/22415741408.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/eb6547ee79ddbe37327254e663f648de/28043089186.pdfIn PDF document text
    • https://saam.vn/images/content/file/lelokuxabugabal.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/ambkhlab9ch7f2ot1u6lf93f40/63141556840.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108f9fb81670---difiputesofama.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/5c6fe1dd38b52b101ae98950707367e3/xumetivovad.pdfIn PDF document text
    • https://krono-original.vn/Images_upload/files/taxiniberowafimitixe.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607365408921f---72376725892.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/66577203026.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/be2560c321ad02b3c3a693cbd228ca70/webuxurawazibifanixof.pdfIn PDF document text
    • https://nevisnews.com/userfiles/ziwapowikaru.pdfIn PDF document text
    • https://ahha.az/userfiles/file/98282958517.pdfIn PDF document text
    • https://xn--arbeitskndigungsrecht-best-5zc.de/userfiles/file/telolizavodewarigu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+be+a+godly+wife+bookPDF 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_off0000f7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FF 10580 bytes
SHA-256: c19b065f77cec371aebaa7cd3c56f5a319445abfd631a49adc95cc085fd91905
font_01_sfnt_off00011018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11018 18016 bytes
SHA-256: ff94c3d85b4da5c8fcf024b13d6c6a9e44ba7ffe07011cdcca98b398958ed27a
font_02_sfnt_off00013fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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