Malicious PDF — malware analysis report

Static analysis result for SHA-256 250f1304be7ef530…

MALICIOUS

PDF

101.1 KB Created: 2021-07-04 08:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 72f9361da62ac46ee577d42e807162f3 SHA-1: eaa62aba7703dfb7657895c3dc5445be3071c974 SHA-256: 250f1304be7ef530ba4ec718c4c7d673f0c6484bb20aaac897387f2a5960f42c
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The presence of numerous links on potentially compromised sites indicates a broad campaign to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9358

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 https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722433c4930---gunoxipojagitoka.pdf
    • http://jtour.vn/userfiles/file/66577609207.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160984b686179d---9427479865.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e63e4918d---xanurerumunikupekuribexax.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/ba3c246384733f6ab908709728b4787d/30718174669.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/41189285857.pdf
    • http://evohome.pl/userfiles/file/xenotekumamemumebotosuso.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/a9a46966d2894b52f0801e957c417ef8/44873351302.pdf
    • https://licorne-hotel-restaurant.com/userfiles/file/76375261197.pdf
    • http://rajskiewakacje.pl/userfiles/file/44082693760.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf5da15b4d---taraviwuxivawuzowabawav.pdf
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/84024938133.pdf
    • http://gtshotel.it/images/file/76619452416.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc075a20a51---41442258573.pdf
    • http://assushop.com/userfiles/assushop.com/file/bemupuxoviluvezowezopowu.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/48221524ff2948660cda12453cdde59a/temubilukoga.pdf
    • http://thedewakohchang.com/image/upload/File/8729524602.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/418d2ef98a0aa0739718530a24e1abfb/67517963362.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/42f4cb0ea8a9096d76b75b32a8475a80/kemes.pdf
    • https://rent-1.es/ckfinder/userfiles/files/lovinev.pdf
    • http://kasargod.net/uploads/file/moladupekovozanuj.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16089ced48c9b8---24143394560.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e5cdaa0bf---44393865790.pdf
    • http://keyflounge.nl/userfiles/file/wodatusalep.pdf
    • http://twothirdsmajority.us/clients/38522/File/76910233445.pdf
    • http://refpecsbelvaros.hu/kepek/files/talitadavoxajofedagaduz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=definition+of+endeavours
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000effa.bin
0185d2ac674f82d20b14138693fb59c29912ac4c6a1acdff92a79c250ac71cae
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEFFA 18360 bytes
font_01_sfnt_off00010dc3.bin
ce1eba69e0929fc6f48e8759d93a5cbe91082cf9d31f05594de326d77e2b3806
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC3 10468 bytes
font_02_sfnt_off000125b0.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x125B0 3464 bytes
font_03_sfnt_off0001332b.bin
6514c9164da8124bedc6817d706ac6eb8048c6240c54bcf1cc7efdaed53303e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1332B 23468 bytes
font_04_sfnt_off00016db9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16DB9 16792 bytes