Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad4f589bdd9a74b…

MALICIOUS

PDF

89.6 KB Created: 2021-09-01 02:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a8e331208c98e9d0636f5321e994bd03 SHA-1: 935dca15e0e80b9b9d753f022f05ee0a92cc6e93 SHA-256: 2ad4f589bdd9a74ba647228f67c38b29b4796c0fc97cd9bb300cf86c7218ec65
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to websites hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and does not provide clear instructions, but the link farm structure is a common tactic for redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://edsmithestate.com/clients/8/8f/8fcea3baa00381bb68ca4dcda22eb4c7/File/dunanebuzimawibixame.pdf In PDF document text
    • http://aatmicscience.org/asuserfiles/file/dumubadevuzuxakijuzewep.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/g8p1mjhq7shovcig6psur9fdp6/romejumizexabagis.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/2ae5e2406fdf763737e709d4ce0db91c/59018245428.pdfIn PDF document text
    • http://hyswimpool.com/userfiles/xidazasilarutomodik.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/ca327743a7dba1af6edb163d8a869007/89842816458.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/29953743256.pdfIn PDF document text
    • https://centaur.vri.cz/docs/files/nosevarode.pdfIn PDF document text
    • https://tempegaring.com/contents/files/lujivaduvudojurawawad.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/lusurixakuzurele.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607bebec640dc---59805310458.pdfIn PDF document text
    • http://changecn.net/ckupload/files/jamazafe.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/14940065058.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af4ee76e6e---17362970641.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cff1398973a---tapefovamirukonesede.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/25476790244.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a84d9acb36---66079291368.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/6278023462.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/a0decc0304158f69506104a08adcd979/40937501434.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/mexitovobirarolimuvejiga.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/rirogudi.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/28821505822.pdfIn PDF document text
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/bemulabamuvusaba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=describe+the+heliocentric+modelPDF 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_off0000fa86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA86 10616 bytes
SHA-256: f88b0b7754d195b10924588286a16612edcd2f4603193f9c70d3ac6dcac47a34
font_01_sfnt_off00011288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11288 17620 bytes
SHA-256: ed5f707a8c58ed7696b8b34763657161e5b21b205bde507e2e50d5646255709f
font_02_sfnt_off00014051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14051 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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