Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e7490347bdaeaa…

MALICIOUS

PDF

68.7 KB Created: 2021-09-28 06:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b03bc845415ab1dfc09bf022b910c725 SHA-1: 5b52564e2989639e1024dee99cdc010551a854c4 SHA-256: 32e7490347bdaeaadff0b0eae12ddc68df0ec37aca51229b7ffbbec27a39d25b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress upload storage and other disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://et-auditing.com/userfiles/files/9906976641.pdf In PDF document text
    • https://strechybenesov.cz/content/zosefobiwogadoj.pdfIn PDF document text
    • http://xinchenfast.com/upload/file/dakuzadunirutadevadawu.pdfIn PDF document text
    • http://fivelscope.net/fckimages/37430305041.pdfIn PDF document text
    • http://ediliziaunoaventi.com/userfiles/files/56032941991.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/21532135330.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/lufalewor.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161400309ef2da---48603924304.pdfIn PDF document text
    • http://clingac.com/d/files/11824439914.pdfIn PDF document text
    • https://photofetimages.com/sexaxuz.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161523835b1d39---fovisotijopaverigijopu.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/e5f99fc1ffa21b2ff2f09e89693b45ed/53465571997.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/bisexafoduvafevigok.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/vuvizabokotetaboredomiwim.pdfIn PDF document text
    • http://logenamerica.com/userfiles/file/27975140329.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1614ad83417431---50328200199.pdfIn PDF document text
    • https://hijaulumut.com/contents/files/gofegi.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/85665343942.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/56727022984.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/63549113460.pdfIn PDF document text
    • https://cfaegaianascente.pt/portal/userfiles/files/19599433792.pdfIn PDF document text
    • https://rimi.sk/userfiles/file/pukezo.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/32677272718.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=the+torrent+magnetPDF link annotation
    • 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_off0000adc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC6 15904 bytes
SHA-256: 2b46598924a8b9c5eed4a2664cb8f6f175e24b21e25d1f2fc32b05310448d695
font_01_sfnt_off0000d616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD616 10212 bytes
SHA-256: 2faa39b793d9718c5b37bd8c8a7a02d7f1a8d2dbb164184a7285acc75eb196ea
font_02_sfnt_off0000ecd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1