Malicious PDF — malware analysis report

Static analysis result for SHA-256 a296a0c218f41f68…

MALICIOUS

PDF

71.9 KB Created: 2021-09-27 14:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6534019e8e067ee6740f9d4e7905d0ed SHA-1: 6dbdbb0e44825dd8923ec22348c9153257c780a4 SHA-256: a296a0c218f41f68094508cec26006aebcc5fc2cfc68cca63d43c184032e343c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with 'utm_term=adobe+flash+android+apk' indicates a potential lure for users seeking software updates, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://crysiq.ru/uplcv?utm_term=adobe+flash+android+apk PDF link annotation
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/bea0542dccf48314a31bf1621d958a59/8263821086.pdfIn PDF document text
    • http://aiaato.com/FileData/ckfinder/files/20210907_E3444640C4AD937A.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e18c925622---senijilegirozizegumabuwe.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/45215451428.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/boluzumevutagelajevato.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/94303322606.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/886322c28699661f7be2c909e69da2eb/32104992144.pdfIn PDF document text
    • http://nemochem.cn/upload/files/sesaneto.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/6afa91aff63496954594aa901af4d022/98501409147.pdfIn PDF document text
    • https://luiginoiobbi.com/userfiles/file/33020268465.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/kogidow.pdfIn PDF document text
    • https://ysh.my/userfiles/file/witorabobikabisex.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/44156833855.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/toputisarali.pdfIn PDF document text
    • https://tigaintan.com/contents/files/35428103545.pdfIn PDF document text
    • http://jeykrishnaclub.com/images/file/nakoxemapelazezenelo.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/53500368723.pdfIn PDF document text
    • http://avtokapriz42.ru/userfiles/file/noxave.pdfIn PDF document text
    • https://casaalu.com/luutru/files/jojesoz.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/gegisiguwajoxefobosuwezi.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/lozitinane.pdfIn PDF document text
    • https://qnzar.com/files/vexotidejanit.pdfIn PDF document text
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/81235294384.pdfIn PDF document text
    • http://stonebreaker.at/91322580591.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_off0000b251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB251 18928 bytes
SHA-256: 7fcb755db66786d7c9d6cad909d33c584d3ccdfc6728c9aea42b7f8d60aef43b
font_01_sfnt_off0000e20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20C 10708 bytes
SHA-256: 9f455002722087154d2db38e03f2296c41bcb477579ef0153c4d35ded5f7f012
font_02_sfnt_off0000fa54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.