Malicious PDF — malware analysis report

Static analysis result for SHA-256 704597f49e0ff1c4…

MALICIOUS

PDF

84.6 KB Created: 2021-06-26 07:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c9823bd78de9957e23e2dbe00c155fcf SHA-1: 4e4f4630d06bb6cc87b0244302d1479268d1d32e SHA-256: 704597f49e0ff1c4757d5b6536fa9cc171ba6c9d89ccd2088e1c954959667e76
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The presence of 'utm_term' parameters suggests a phishing or scam campaign. ClamAV detection and ML classification confirm the malicious nature of the file, likely serving as a lure for credential theft or further malware delivery.

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://queure.ru/uplcv?utm_term=new+free+fire PDF link annotation
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2822e58ef---wizoketujafalisabanupero.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/sexodivelopedet.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/e625d37b98e8d40e3bdba70aac3b59e2/21595546840.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/pebikipesisuvekijom.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/79506642216.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/198ufi02u2lf85krsn7qql2vs6/kuwofugemadebazivaz.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7ba00d5a7---figufatetixuki.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021061219562673499.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/6dongc2v6lm185rnp91p2bja9p/mefuvavowebobolemugiraxa.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7b0fa82f3---xisuwilodag.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16206730616645.pdfIn PDF document text
    • https://summit-christian-academy.org/scauserfiles/files/67699897098.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cea98b783c---45712572437.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd5801b702---57584679671.pdfIn PDF document text
    • https://hoalavender.net/upload/files/30092854845.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/94297829304.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ba00d89d3---12637762990.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5278dd2d62---wesajageruxodozafiwowi.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/j3t4lq4p5m9fu1c1hk8csekftq/jutisejenabobamivika.pdfIn PDF document text
    • http://jngf.cn/files/file/taxobavazuwoxabinapuxiji.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/41676290094.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16074cf9bb659c---lomojobifirerefudamatid.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/48bea98a9994f608edb125dab5cd7a53/50407322286.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/talup.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/siwudokijopexemomani.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_off0000ec17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC17 16704 bytes
SHA-256: 83746a8ef9c8c1b6574e245ab7c42eaad3a955310d2a08efdfdb709f2532baff
font_01_sfnt_off00011745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11745 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5B 9572 bytes
SHA-256: 4897aaab9f44874398986c7a860600e7b9ef60b4602b3fedeaf4e7c2d0285d1d

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