Malicious PDF — malware analysis report

Static analysis result for SHA-256 274f6cd6a37a1482…

MALICIOUS

PDF

76.2 KB Created: 2021-09-14 08:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 8ce68437c20ae34978bef1032b6f2b2d SHA-1: f6521112b41e01f093bcd429ccbd1f7bfd5e807d SHA-256: 274f6cd6a37a14821e285589e44624e995f4d90cc8236ebed8e0ec778489f53b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it functions as a link farm. The embedded URLs point to various domains, many of which appear to be compromised or disposable hosting, suggesting an attempt to distribute phishing content or malware. No scripts were extracted, but the PDF structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pistant.ru/uplcv?utm_term=mms+to+sms PDF link annotation
    • http://jonkmp.nl/img/cms/file/nupibesevugogowuvupujo.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/vuvodajavo.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/f4d2c60c75a9f4c07c29cb3ba38deb1c/51093929414.pdfIn PDF document text
    • https://aashianarealty.com/file/28992888035.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8771e01fc---24199926985.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/rusepebugulagexenodul.pdfIn PDF document text
    • http://vibrator4you.cz/UserFiles/File/guluweweminuwo.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/59735222462.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/42178038374.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/60001299916.pdfIn PDF document text
    • https://777mto.info/contents/files/kufomugasorujizabana.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/akq22ih69dhr3kar3b29eu7jn5/nifamelexosibubas.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/20996410157.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/50499578339.pdfIn PDF document text
    • http://ustunongel.com/image/files/23559157170.pdfIn PDF document text
    • http://boldogelet.hu/media/batiropeluzajemuwunu.pdfIn PDF document text
    • https://happyfun.tw/uploads/files/202109110509139156.pdfIn PDF document text
    • https://mobisteelegypt.net/userfiles/file/98447886816.pdfIn PDF document text
    • http://dsraxys.com/uploads/91326025696.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/vunaxuloruli.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/97947387314.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135dc9762a5a---16528032289.pdfIn PDF document text
    • http://ageddfjtjgrade.pretty-match.com/upload/files/bekibikevazenoxupifabi.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/sobifevofenisamevu.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/43345427129.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_off0000c9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B4 9624 bytes
SHA-256: 35d36baf1e9b1eef0cdd83318df4198820dc857b76deaf42f0885df6de335b02
font_01_sfnt_off0000de98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE98 17312 bytes
SHA-256: 90ff37c5cd82bf6f70792d4664055e59392e68006760bc6de00e68e48b64cabb
font_02_sfnt_off00010b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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