Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6718f191d87238…

MALICIOUS

PDF

98.3 KB Created: 2021-06-15 12:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 010108387a650fa7e25c0f469b1bcc4f SHA-1: 0c65bac1b7908ccff487e90cdc93d5fa6e224062 SHA-256: fb6718f191d87238e732172c65094573f94cfb4569fbd72ead0040c4c0f4fb57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and is identified as a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards the exploitation of users through deceptive links, likely leading to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://queure.ru/uplcv?utm_term=filmyzilla+by+year+hollywood PDF link annotation
    • http://klhl.com/userfiles/file/kemewudi.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/4e95e22ef89b659d605c30eb3a8a64a9/punowusevajuremezixu.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/612ce3847b163821b3681612fd3af6f2/7087297795.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/ad854a39c140362b2a3f58944f80cd7c/mugobemosolejetokot.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/tqssmlbbg73450tp27umhc8va4/50221382425.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/jt9g6qbvc8hhcmcslsfqub9816/43368399480.pdfIn PDF document text
    • http://bakoca.hu/files/file/nelolabukuzusum.pdfIn PDF document text
    • http://arslanemlak.come/file/93022055625.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/2e2ae6b26e1e184c6c8b8f1d194c5285/fobunelifodunup.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/kujudofi.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/466d185029b03b5f7e796ad906572f59/gatasoroxenigilere.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089add57b3e4---jozam.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/lasapuvan.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609333edb04ff---siwiwadarejoxaga.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085229631227---sojebesaro.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/gonaneraxofamumuk.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609443a7b3eba---susolajesesaxawegivisaru.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862090675d4---4765021009.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12273 4828 bytes
SHA-256: 4ba44bb10cba66c917a66bd0c10f8f7bb078ffd7b2964fd080fefabe13be7195
font_01_sfnt_off000132eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132EB 11116 bytes
SHA-256: aa8d7f137ac1d7bb1e29993153ea113a573d4b191d47806f7ed354fe527078f1
font_02_sfnt_off000158a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158A1 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
font_03_sfnt_off00016dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DBA 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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