Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d0816168ba292a…

MALICIOUS

PDF

86.1 KB Created: 2021-07-01 14:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ae7477e9b67532420d42b5dd44b30af0 SHA-1: 4721eee76fc2a188dcf3e1f54ff1327a903d75a8 SHA-256: e2d0816168ba292a612f2eb9c88d87cf6a1340cf40f98d8c17bbf9fcecd69bde
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution lure. No scripts were extracted, but the presence of numerous external links strongly suggests the document's purpose is to redirect users to malicious 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 https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0d947dcab---25677279651.pdf
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/44342173475.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609101a4d4709---49706878587.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1608710e339a47---regisebonodakezutef.pdf
    • https://areicon.com/images/file/29185067294.pdf
    • http://mai-colle.jp/userfiles/file/podivozexaxebem.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/7c6827bc428f75b9f0c110ec0b4203a2/lirigamabuvajowavesimodoz.pdf
    • http://zaintik.org/files/galeria/files/55896293073.pdf
    • http://tuttotop.com/userfiles/files/javikapezagabafanopetis.pdf
    • http://olneyjune65.com/clients/d/dc/dcef5d22f85ec69f5810ba62c2e8cf46/File/tusirubivam.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1b0346a44---82557432596.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/p1botdjre25h95qqldaiblqh2q/wufidubeviratok.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/c8960f2ad9a80d517137f8c4a546a74b/4102654786.pdf
    • http://ajtoablakcentrum.com/_user/file/50095918655.pdf
    • https://edbcagliari.it/file/39440815372.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/70cf89becc932d412d6f47eda864f644/likagidubafaritonofow.pdf
    • https://ehotelgateway.com/bot/ckfinder/uf/files/16334498441.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/24c7af3b52e1e055853eb9c77c4053a9/50489734104.pdf
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078955757995---vewasuneruvuxivunin.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bc99a88815f---45017072143.pdf
    • http://kcobafl.org/ckfinder/userfiles/files/vemubutonafajuwulufoja.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/n8nvvmdr7htsgpc25a5eccqo0l/75650457591.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8d745c945---5677168465.pdf
    • https://burgas-remonti.com/userfiles/file/kemafajekosekedusinuwazu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=ask+questions+get+answers
    • 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_off0000ed07.bin
aef7f9163f7f3a329c2860b1f5bfcc4e8da29db3b6a049f561de2e0df177f58b
pdf-font-stream PDF embedded font (sfnt) at offset 0xED07 10644 bytes
font_01_sfnt_off00010556.bin
1183ec65d928709137cc133051938ede3369e01672fc21f3c127a876f6806e04
pdf-font-stream PDF embedded font (sfnt) at offset 0x10556 17380 bytes
font_02_sfnt_off00013319.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13319 16792 bytes