Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f3d92d4b98b893…

MALICIOUS

PDF

77.0 KB Created: 2021-09-21 09:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2a9a4864950a07890dd24850851de0ec SHA-1: 9cd87ea804719a98d6f6eb2a5ecc359c18a7d20c SHA-256: c1f3d92d4b98b89338e8639d123984ec71ab62e4d87ed7a0c65c3117b0673490
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 http://www.bargiel.com.pl/ckfinder/userfiles/files/nagolot.pdf In PDF document text
    • http://starma.pl/files/file/86617170265.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/dovusezifoxosovad.pdfIn PDF document text
    • http://noithatmyhome.com/img/files/puporotifekexulor.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/3333684152.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/27917404579.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109200103219845.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6d4aded2e---78614571739.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/69896318063.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/77716531559.pdfIn PDF document text
    • https://loffoxfitness.mvwebsolution.com/userfiles/files/20258243092.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/fusajat.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/fc7472161ffac43c65a188714f0e5b17/70934348449.pdfIn PDF document text
    • http://centrons.com/uploaded/file/70766365761314ba303e77.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/56301749435.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/13847735843.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/55509537895.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/wonemijozoxotuz.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/jazozezov.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/d261beee4238e1020965a03bd3c43366/gewope.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/13351505655.pdfIn PDF document text
    • http://marklaliberte.com/fckupload/file/xapakazezizetolupatanom.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/sanisezekif.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141acb50a9b9---xudoxaxi.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/02/file/wonerixedabas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+transfer+photos+from+android+to+chromebookPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/a532118d687f877e7d25f53f5548c6d1/kojefesaxifowobivozal.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_off0000c9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EB 16400 bytes
SHA-256: 9d6e27628dc79f82fa94f772c19f73af04959051153d8d4c7a49f4ba97f64def
font_01_sfnt_off0000f40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40B 11148 bytes
SHA-256: 2e349a2da7b5f0fe994dbcde6bc00258d610e319443cf3503915f1e7a2ebfe69
font_02_sfnt_off00010db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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