Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8e2a505c8c3009…

MALICIOUS

PDF

86.1 KB Created: 2021-06-25 21:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a80b58c359e5223ec49cd1354e9b1c4 SHA-1: 6f38b6b376e1885160384d58e64285d9f0d7beef SHA-256: ae8e2a505c8c30096870fc0e14a7c15c6c024a9af2f0daf4b0d6dbeb5481855e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae5b16d2ef---rizidexerifexekilavevaloz.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8900adb66---46971663499.pdf
    • http://skomi.ru/img/files/file/68739953722.pdf
    • http://webursitet.org/Files/file/jurisodibapaxemujogamifo.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160adbced44e02---sakupinuxefa.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/8f8fee683b261aa3e7ebfadf8a7dddb1/68902664404.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/858f1f3b4a3613560ba3a1a0436b975a/jusibe.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855ebbc09a0---60888829863.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073fc591e9bf---bilogavajorovafizojareko.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/a4d7f3a9af78ba2776c9368cf85ec50c/93571378055.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/82g11fm0a0spgic2a8sa3pmqpf/ribevoz.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/26313488d31c8513693bc10b2813a7f1/99851164760.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc9a6452e0c---26965726866.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/gmitc5tia9d5inicjqn4sadon6/mefivanefa.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090717c16f39---85350762143.pdf
    • https://www.alapan.org/fckimages/file/15322103305.pdf
    • http://diysmart.net/userfiles/file/8512600086.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071764b7881a---62018110976.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a22483787a9---99842348098.pdf
    • https://golf-tout-terrain.com/publish/page/file/vemewop.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9afc25274---peruwesarenudawit.pdf
    • http://uco-kampen.com/media/files/61379912615.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac823abb547---29660172882.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/j0ngr8gh3sp0t9qc7cpf3fpkcb/wilagirapinefamujuduvoru.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=why+does+fat+build+up+around+the+stomach
    • 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_off0000ebd1.bin
b724aa3dd7ebdbe1ec9a07b6a7659416457801e7208cc66ec32fa97319c486ac
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD1 17020 bytes
font_01_sfnt_off0001175e.bin
2852a46e7c58ad67ec4f821f24b16a7c750d1fed8cee0af39baee279f75f1218
pdf-font-stream PDF embedded font (sfnt) at offset 0x1175E 11232 bytes
font_02_sfnt_off0001314c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1314C 16792 bytes