Malicious PDF — malware analysis report

Static analysis result for SHA-256 1204146416115fa8…

MALICIOUS

PDF

81.0 KB Created: 2021-09-09 23:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 419369bbe7005bac47327f864b9c8fa6 SHA-1: 119d860ffc421b8615d6b87ee5ac5299f14d3a45 SHA-256: 1204146416115fa884aa1d9a3daa3b4f4c0a7a8e54c69fdaa45bcc2fd6ea2ee5
164 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to potentially compromised or disposable hosting. The presence of a 'download button' lure further supports a malicious intent to trick users into clicking links that likely lead to malware or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://dealershop.es/userfiles/file/lixokemolow.pdf In PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613354811a3fb---94090117728.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/29875511617.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/ranapiboralin.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/nanexenuninodo.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/buwezavagufarufew.pdfIn PDF document text
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/59280231821.pdfIn PDF document text
    • https://harmony-lazienka.pl/Upload/file/wepiwiga.pdfIn PDF document text
    • http://conditum.nl/userfiles/file/68684791227.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/75101395710.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/zobitufirijuposurafat.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/15158382681.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/zelaxobofoj.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/66710573389.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/f2i6kpkvkoujpdl1ssl61sou8i/sokitofakudedux.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/zifimefudosexuraribib.pdfIn PDF document text
    • http://gensugroup.com/upload/files/bavusunumid.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/kuvenugewiwalenibizolu.pdfIn PDF document text
    • https://partetesal.ir/data/file/buviwoxitewit.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/47907621493.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161388ae6cd442---tufomosixapokigifukixagil.pdfIn PDF document text
    • http://celesteandtorsten.wedding/images/file/meneka.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/58441932730.pdfIn PDF document text
    • http://marisqueandopremios.com/campannas/file/92742879546.pdfIn PDF document text
    • http://nanoservice.cz/upload/file/61921547351.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/91687757261.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=video+mp3+converter+apkPDF 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_off0000d997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD997 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A9 17152 bytes
SHA-256: 513bbb12849d875c0815d917ceb68b58379e4531328ed26702492a4c8bc98eb6
font_02_sfnt_off00011da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA6 10760 bytes
SHA-256: fac194919f1a4ea2e54c0d2f00129e17704bf2805e5be633c8827816af311620

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