Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eeb0f0e538a1d62…

MALICIOUS

PDF

81.6 KB Created: 2021-09-06 05:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bb86359ba6b9f40a3c7c270235992afb SHA-1: ee95b7d91ef5b2922017b4910bdc8e2d8463bc5b SHA-256: 9eeb0f0e538a1d6292fa22087ca2846728788ae5b952fcfe10e4a19874e5020f
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, directing users to numerous compromised websites and disposable hosting domains. The primary intent appears to be phishing or distributing further malware through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://oniceh.ru/uplcv?utm_term=sat+critical+reading+passages+with+answers+pdf PDF link annotation
    • http://dolphinkorea.com/files/files/85620614864.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/64707155789.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160becb389d578---78378293903.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0822/df76b7ddc24e5de402359418b6585a68.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c9240f97b---87586578559.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/fce4e2592d38b5f8a4c565cfc0c1683d/36767974974.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/pufefagemop.pdfIn PDF document text
    • https://www.domosystem.gr/ckfinder/userfiles/files/lijekilomodipolekabizid.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/27368578161.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082d8c1454d8---21365005572.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/ced23dc1183eaa01bc296810aeae5118/10651973326.pdfIn PDF document text
    • http://manegedebuitenwijck.nl/uploads/file/sibozusi.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/78257264012.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ba1030570---58091805325.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/xukagotapigi.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094571853445---rojukuzewemujowetexinuki.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b3642c35653---57998120275.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/vasukenamafuz.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/169fa3c9a05a0087ea95332ab0423bd8/11294148837.pdfIn PDF document text
    • https://pellevah.com/upload/files/putufepemaxoziv.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/tusejajajape.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_off0000d949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD949 18152 bytes
SHA-256: 49e8a8eba304a3e02c6a8291fc8003264a12b4bce19acffed220d23b8b7103b7
font_01_sfnt_off000107a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A2 10940 bytes
SHA-256: 7939768dbc9405450251db970c657ff2da7879c2db167740098c804d769aa767
font_02_sfnt_off000120b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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