Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c2da0975b5097d…

MALICIOUS

PDF

98.4 KB Created: 2021-08-21 15:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f324e67b95614bf433d2e77e113d5c63 SHA-1: 03891ab90f7fa4b1edbf8f3f700459fff00a8d72 SHA-256: 47c2da0975b5097de68240f36d621301be3b1838bc64e9e0bfbe78a07323f54a
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, with the latter identifying it as a phishing trojan. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the presence of URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://ropesadventure.com/d/files/37342577196.pdf In PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c9a6178f2---gimuxerebi.pdfIn PDF document text
    • http://roocenter.ru/upload/file/25195256367.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1609f39035b047---xuzovagutanojonap.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/639474a1a20d66382ac8e8c776398b1f/70261936038.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/jirapexopitebo.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/89534379962.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1623812205.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/s4tq2im5gja746b8604t98urog/18013573509.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/29545433272.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/8211746552.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16120df54f051e---83386133458.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/fubibeterivolotejimojiwu.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/popevu.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b96cbb534ef---59399894715.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d83638755b6---40125234890.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/88353364432.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/koxabatipazosudedo.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/63499742285.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/177e4fed7ba01ec7b5a7ad23d077d908/nirejonowa.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/dafodorosupibukavatatafom.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/vovuxumakudaw.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/7e26c4eefdd240244be6b687ff0de284/jafuziseveva.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/r3lr833mk3u5a2urmcsbl1aq1o/numujaku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=total+annihilation+download+freePDF 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_off00011e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3D 17264 bytes
SHA-256: 9e964971e8f66e990dbbef4e76a126a50fc70fdcd782ac903c188c04651b177a
font_01_sfnt_off00014aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AEF 10332 bytes
SHA-256: 021454a0dba0ccbd5841bd93658b88cde5c9b4b993dd8fd97445aa095cee3b14
font_02_sfnt_off00016233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16233 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1