Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a5ae9e4b772f9c…

MALICIOUS

PDF

85.4 KB Created: 2021-07-10 05:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b22d7cd0b70d5535f6859bb56f22599f SHA-1: 166de8d9ec3eb1ef5581e6407870dbd303773bba SHA-256: 74a5ae9e4b772f9cb80a5553e37b1f3afcdbb0a7d62d438769c61a0ab7a569a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The primary purpose appears to be directing users to malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1fccceca3---15940049594.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1606edcba025a6---gowililovedofaniko.pdf
    • https://szabobuszrendeles.hu/files/files/86444765401.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/35cddb25f6272bfe0a81bf5a6480a308/difuneworavemopuw.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/e6f356338516b810cba4e175936bc1b3/kevamukesijamuparukamok.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080ff73c46a2---femoluvuxamododuwej.pdf
    • http://lapawan15.com/shop/fck_file/file/33016827392.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071aebe4c047---88510573296.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54c51ca9b1---30265658054.pdf
    • http://cmtsport.com/pliki/ginexexod.pdf
    • http://copy2d.com/ftp/image/file/fezobi.pdf
    • https://ludifrance.fr/userfiles/file/gukuvelosedametosezesav.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/27b8ab1a06d050e6ed081de00aec66e0/difekuwapoboxobifap.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/5e99783b8c1121df203c1bacad11489b/59377537454.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/5b752dec4d4d5226d1edb8a3bbf7772a/44683053583.pdf
    • https://lapalettedesarts.fr/gestion/file/14533888429.pdf
    • http://nhahanghienminh68.com/upload/files/17084751752.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/26ab110f4b54be14b2272911120d0936/37518431333.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c4fbb5562---39554500218.pdf
    • http://volamtuyetthe.com/userfiles/file/36581074831.pdf
    • https://anctools.com/ckfinder/userfiles/files/98523982634.pdf
    • http://www.awakohchang.com/image/upload/File/8543261504.pdf
    • http://studiobardinisrl.com/userfiles/files/xewenokeru.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16073f09046b90---pevonodudip.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847261a3f5e---842072850.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=baked+stuffed+lobster+with+crabmeat
    • 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_off0000e828.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE828 16792 bytes
font_01_sfnt_off0001003f.bin
0b578838328e344a013cdee4a4ced69db965bd3bb9110e73c6bbfdf34813730d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1003F 11108 bytes
font_02_sfnt_off00011a43.bin
926985a4dd376abc7d556b5c82cd8814d3239f7a6c8d53801a6ca76ba1e2180f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A43 17816 bytes