Malicious PDF — malware analysis report

Static analysis result for SHA-256 9062a1b6b8fe7cdd…

MALICIOUS

PDF

82.7 KB Created: 2021-09-17 04:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: febc3cb6d6cea56041346c92eae41914 SHA-1: fb498ecdee84136f271c643a9ff8ef77fccef84b SHA-256: 9062a1b6b8fe7cdd7441205a5484a75bb393b3c1fa75a1bee059bd9ada8ea16d
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to lure users to malicious content. ClamAV and ML classifiers strongly indicate malicious intent, consistent with phishing or malware distribution tactics. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://catamma.ru/uplcv?utm_term=where+is+trash+for+contacts+on+android PDF link annotation
    • https://n-vv.dk/userfiles/file/57072145918.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/d830b02e273a6e729a8efe6c04d2e979/zawifidupiza.pdfIn PDF document text
    • https://mashtalkandil.com/userfiles/file/nuvexajupexe.pdfIn PDF document text
    • http://393citizen.com/upload/files/91070069093.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/26213937464.pdfIn PDF document text
    • http://xn--76-6kca8aqc6c.xn--p1ai/pic/userfile/saritopagiwevozusatuk.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/81466540590.pdfIn PDF document text
    • https://polytex.de/sites/default/files/76435297834.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/keliwitira.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/suzadow.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/71708882927.pdfIn PDF document text
    • http://sichera.eu/userfiles/files/73281324245.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/shaipu321atf5eq5em8a940qua/8055652268.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/genorozotiretafunewugodav.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/22658258db1b548275f15bfe21a09682/nugatakuvufifibemuvedalu.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/ninurez.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/59204120478.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/31758884707.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/gekopeveramexozamevare.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/2b70edc93e56bc78b592ee523fa87f17/99252060939.pdfIn PDF document text
    • http://abc-tel.ru/data/File/dujofemoxupujep.pdfIn PDF document text
    • http://4darchitecture.org/img/all/24199970856.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/30487160886.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/42142388151.pdfIn PDF document text
    • http://symbolfoods.com/files/file///18647257342.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/segufamaravonate.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_off0000de00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE00 18184 bytes
SHA-256: eeee2e7b2c26abb85ccfde4a0bec0cbee1769a7ace08e64bc19e6f1a6edcc108
font_01_sfnt_off00010c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7E 10520 bytes
SHA-256: 09f110e6a9c3e60d20892524d9777d97ae6a2c8f785a3bed1b7caca9399696bb
font_02_sfnt_off00012476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12476 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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