Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1963722b6f135f4…

MALICIOUS

PDF

84.1 KB Created: 2021-09-20 15:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f6f771d279f5fa772f0acbdc2b129af4 SHA-1: 16a4e2b7ed1b90c2427988237d2cede103913b62 SHA-256: a1963722b6f135f4b7f4dbed7e25bc7ea72bff8caa09ca5c25e5b3867321c2ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which are part of link farms hosted on potentially compromised or disposable domains. Heuristics indicate these links are designed to redirect users, a common tactic for phishing or leading to further malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://archism.ru/uplcv?utm_term=import+icloud+photos+to+android PDF link annotation
    • http://g-shocktou.com/user_file/file/pifirupovodorobofi.pdfIn PDF document text
    • https://medtek.vn/storage/file/jeloxozadepazeri.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/5454664155.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/59423115091.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/zubegesa.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/sixifulelitazipidebozopu.pdfIn PDF document text
    • http://coytex.net/ckfinder/userfiles/files/ronubemopedevutokijepu.pdfIn PDF document text
    • https://ancoraeducacion.com/images/kubinejerokunukapezewi.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/65445857156.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a2e36c2f0---jipotawamik.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/37e57528b22efa5c548b58816b67f229/31229460786.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/17863549251.pdfIn PDF document text
    • http://internet-trade.eu/UserFiles/file/lepizivewazupebuje.pdfIn PDF document text
    • https://debo-fit.be/userfiles/file///kugegumamesonibozapiwe.pdfIn PDF document text
    • http://maychebiengoduykhuong.com/media/ftp/file/siwunolamu.pdfIn PDF document text
    • http://syntra.pl/userfiles/file/jixopojamup.pdfIn PDF document text
    • http://acelybio.com/upload/files/mazadakupowoditawekipekon.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/dasijumetefizagukusux.pdfIn PDF document text
    • http://signauction.net/userfiles/file/50928605646.pdfIn PDF document text
    • https://sanidom.pl/img/file/ronitumesepepadusudukebuf.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/kowosomoxediwime.pdfIn PDF document text
    • http://metapolar.hu/tmp/53279402670.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/fikukisitimumaxebovis.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dakeworurizirunomilazaj.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161444731162aa---2986781665.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_off0000e437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE437 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC49 17736 bytes
SHA-256: c0bce2ccca13b87fb903d2bf3a5dd4c9fe8cf86bb4de7c45494a2f6a79f9334d
font_02_sfnt_off00012a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3D 10696 bytes
SHA-256: 3104b72117c4c99bec20b69e52a13cf1cb9d28716458de30511862bb3d7d5a82

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