Malicious PDF — malware analysis report

Static analysis result for SHA-256 27955aa389ef4fcc…

MALICIOUS

PDF

82.2 KB Created: 2021-09-19 19:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 63d788a0fd51934fc3e2af5eadfac6b8 SHA-1: b994aef36f46b6e671b7cbef73f1b75f186fe632 SHA-256: 27955aa389ef4fcceec95b99032f884dc66e4a9728aeb8a0960c636b8eea7d9b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to various external URLs, some hosted on compromised WordPress sites. The presence of urgency lures suggests a phishing attempt to trick users into clicking these links, which likely lead to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://philabc.ru/uplcv?utm_term=can+instagram+see+who+viewed+your+profile PDF link annotation
    • http://babamoleskine.com/files/file/tusarefotufolikosefa.pdfIn PDF document text
    • https://turkeyinsurance.info/images/file/sugiturok.pdfIn PDF document text
    • https://phr4u.com/files/49613081719.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614620147b589---14096123256.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/51504762985.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1613e18ebd2610---zoduvopilonubiribalomux.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/10883714323.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/pekesifizukewiko.pdfIn PDF document text
    • http://master-br.ru/img/file/34233981966.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///pepuporanasulosaxavav.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/vutizovupadudoran.pdfIn PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/dedetelinesudetojejukud.pdfIn PDF document text
    • http://mzch.pl/userfiles/file/rokojar.pdfIn PDF document text
    • http://siciny.pl/userfiles/file/38839130377.pdfIn PDF document text
    • http://tolltisztitas.eu/userfiles/files/tofodazexavig.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/tiselumibemobaruvixe.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/razus.pdfIn PDF document text
    • http://syntra.pl/userfiles/file/70869076391.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/88711781619.pdfIn PDF document text
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/60727547649.pdfIn PDF document text
    • https://globalathena.com/ckfinder/userfiles/files/gabedilaluxedebafavu.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/14016132971.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/mobekuj.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/b7e66319f6ecf586d8edded3409d4c67/jepimukatemab.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_off0000da15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA15 17908 bytes
SHA-256: d78382c073a60b5f07a9995a03423305e3e3cc5e0ae68a02b5b9cbe41d8430cd
font_01_sfnt_off00010849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10849 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12060 11344 bytes
SHA-256: d5cfd9073720f5004f806032c7e3fb4033f1d745e7a6341daec06fbfd98de475

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