Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e376004e611409…

MALICIOUS

PDF

72.8 KB Created: 2021-07-03 16:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f06d4a51ee2c81a6a2acf83b0d4fbdb8 SHA-1: 8f22ff35ad665a0f1ff77eb7c079190c3435de51 SHA-256: 67e376004e61140950a97ff0321074b0d504caeb6f22c179b1d91ac0ab746ff7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with many embedded URLs pointing to compromised websites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure and numerous external links suggest it is designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/c0fde85a20daaf2987e7b6a69be9ab4f/42782994421.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/62c0bd5c361cc3388edd291185ac856d/74296043362.pdf
    • http://www.findvoters.com/userfiles/file/vagitudukonetojoxugapepun.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608356ac93346---81227529751.pdf
    • https://harkakotony.hu/UserFiles/file/28941324447.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b3vdi3dp83mt0jcf6drcgaj2r4/96914090095.pdf
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/xupafatonejurata.pdf
    • https://laps.pl/userfiles/file/gezitexogo.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/94487986728.pdf
    • http://erdivigado.hu/userkepek/file/89971044049.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/ll9um8jtmqn8pcg07hofdc8jb4/sosemebaxodibeji.pdf
    • http://nutronicltd.com/userfiles/file/tigurasigapoxo.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/a2096abf9ed9c988043b7119fbfdaaa1/gabunotuwidex.pdf
    • http://abwninemile.com/uploads/files/tiwogubeparavezi.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee370e84c4---jegad.pdf
    • https://vydavatelstvoklett.sk/userfiles/file/57316305096.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/b8r7k2cjm7c4ab7s623u1iv27d/12430629046.pdf
    • https://a2designbg.com/userfiles/file/48022581951.pdf
    • http://tinavaron.com/ckfinder/userfiles/files/fozizosibota.pdf
    • https://aiaciran.org/cache/fck_files/file/51514522821.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d1dd7abd93c---3263760083.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cba574ecd9c---towabajoxorupawefosibitik.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=cool+math+games+small+square+big+tower
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba67.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA67 16792 bytes
font_01_sfnt_off0000d27e.bin
0dbbbfa120f94e68d45a815ed1b1964fd7b6308bc3c87f9ef45a02a140e47900
pdf-font-stream PDF embedded font (sfnt) at offset 0xD27E 10956 bytes
font_02_sfnt_off0000ebb1.bin
430e3212a4c13ed60539ba3a73409c822d1c2306dbd471dabb556b80b513b82a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB1 15836 bytes