Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21ce5bfa94642d7…

MALICIOUS

PDF

87.3 KB Created: 2021-07-01 10:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 51f8a21fe73d698a888f566156be5ba2 SHA-1: 3c171abf59cba949570076e3f602933111992134 SHA-256: e21ce5bfa94642d7a9cc8b6ecb532a6c596643bf94135b7f5856447fb8db4ec7
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to distribute malware. The presence of a download button lure further supports the phishing attempt, likely disguised as a movie download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850fa425ae3---tenogetodatagofu.pdf
    • http://royalgoodviewresort.com/Uploads/file/baterakako.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5b9d004b8---17014837534.pdf
    • http://amadpich.com/userfiles/file/kaluvivagevesavafotituw.pdf
    • http://agendatourvietnam.com/hinhanh/file/wagimafumagom.pdf
    • https://alatheir.com/atheirwsfiles/file/18219546358.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721c3843932---70094817746.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c35643ccef---70918416588.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/0765f2b56ca29f22d83591efcc3a5e66/gaditonixubirere.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c0a81e06d---4930203807.pdf
    • http://elisa5888.com/shopadmin/upload/files/71982437566.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/a146793162d07b5948d5c64b2c58f627/makarukilala.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/f6bba97eb8d9d862adf42e3c8423c96f/bonumo.pdf
    • https://soechi.id/userfiles/file/rupabakazarorijiluximop.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/28159371259906c038331d6be18f5739/21368367172.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5f5tac4m0d11de9ra37aqsfpj0/84903802419.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/e25339cf93c6d587eb081b7fee3783cb/11548162516.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5905ee11d---83804702894.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdf920bbf3---37506312002.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/7hke46ecvfosngk58fdb7v078a/rukugesasolepefomo.pdf
    • http://perles-del-beya.com/userfiles/file/26010445576.pdf
    • https://lecapsuledigian.it/file/fenavujuzokebitafilila.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/0b5fb0962ee4b309702e47e604320360/kozigoxebaw.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4f6774018---duwijesopone.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=transformers+4+movie+download
    • 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_off0000f38d.bin
ecf9ae45ec5c6d9b707a57d53083ecf09c43e96e593c3c7cdec4e3ffcecf7edf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 16952 bytes
font_01_sfnt_off00011fba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBA 16792 bytes
font_02_sfnt_off000137d1.bin
7bfa4d1c1d2916605a2cc5691a20428725cf4ec0c1bbd82c722d3777b74c89db
pdf-font-stream PDF embedded font (sfnt) at offset 0x137D1 10608 bytes