Malicious PDF — malware analysis report

Static analysis result for SHA-256 492ce51a0a47bea7…

MALICIOUS

PDF

70.8 KB Created: 2021-08-28 00:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 11f256d746569bea57db79b536e18d7c SHA-1: 4c957e83ee4b292db6c3164dddeaf5db39c24e87 SHA-256: 492ce51a0a47bea7d35693a61bc524ce19587493a164f7308ddba809bba90617
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on disposable domains or compromised CMS upload storage, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ketchas.ru/uplcv?utm_term=pomeranian+beagle+mix+puppies+for+sale PDF link annotation
    • http://hublihorse.com/uploads/userfiles/files/81923958213.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/13838223867.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/wizuramopu.pdfIn PDF document text
    • http://grhs1983.com/clients/72571/File/13122703652.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0727cb8f9---beluvomupal.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607362e24fdb0---wobebo.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/66225368399.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/53795443067.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/podinebupebalelamafab.pdfIn PDF document text
    • https://ecoverservice.be/gallery/file/96356773194.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/369c72b186e68ed4b7364981aed96882/jodupofuvefupisetuva.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/ninonejivibetivawomuru.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/9440a11dc3e0bd913e0b9bb9ed8db20f/41808994566.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210717183234_etr0p6.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/50184850330.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/ss2768ffsqknhverjnuij3uhap/58587952589.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606f188eb775a---watujobulitudalunemajal.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/23134286323.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/e53d310ab615cb3319ab16c709f41b30/40456164932.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/67738783881.pdfIn PDF document text
    • http://kramor.bg/userfiles/file/nomogitoteraze.pdfIn PDF document text
    • http://sdes.in/uploads/6808605576.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/14426637913.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d2441669445---29816180426.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_off0000b7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F4 14524 bytes
SHA-256: 16b3462217f41c263c8c6279b0de7d3f8ba35c429ab87e837fc005ca7ac0a40b
font_01_sfnt_off0000dbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFF 10948 bytes
SHA-256: 216e3dca51539af7e435d601021746088d2a0a1c591c86de16cc9d67e7ba4221
font_02_sfnt_off0000f51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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