Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b6a22473004137a…

MALICIOUS

PDF

100.3 KB Created: 2021-07-25 15:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2fce66bdbb1edc928226249e64a6a3ec SHA-1: c8782ea221b6f65408a1008f8279b430ea98244a SHA-256: 0b6a22473004137afa28eebc7f32342b11f41135cd9261fa5eb75a874b1a97d5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to various PDF files hosted on compromised websites, suggesting a phishing or malware distribution campaign. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common technique to evade initial security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/koledomupov.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/f94293bf82b369fe83a84791521f8d78/jojimadamadosagesow.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/8iosfs6549sbv9uqpk9pepc8rg/rivofupu.pdf
    • http://coimbrasoftware.hu/images/uploads/files/fevizalipatugirefazofizo.pdf
    • https://oklogistic.lv/upload/file/61440510000.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/a730vqadhh03aeminct6fljv6l/kotovugepof.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/a09ff100005d5a0b7a84a15c4504a4fe/88432158228.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/vsu64039gd8827ue31j88pnun6/takokerunuselifokefubute.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160dac2ec5c2fa---jodofesukozinanegajifo.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e288274a0a---fibemebibewafe.pdf
    • http://pitneyclan.com/clients/c/c7/c7afcfad87c307b096642b2e35f52d25/File/walupavojulosagoburuze.pdf
    • https://alubiasdetolosa.com/files/galeria/files/36345818017.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/a1e454495a85aa0542f89d6e75c3c833/puvipaso.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c63a54b1a4---genoturudidezogijaju.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/52c08c5abb7e4f378e7a748417403c55/remuxezezum.pdf
    • http://clinicaveterinariacene.com/userfiles/files/pulagupixapasifuno.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/03f1c61a0a7b2b70d47e340e94a71d34/52536343797.pdf
    • http://almar-bus.pl/userfiles/file/77530929418.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/poku19621hnvkhbd9msp1slptg/16351158616.pdf
    • http://stavclearing.ru/upload/files/xapedikakamabimopewi.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/a66580a4265b37ecc27a876cb1653d7e/96854529094.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/b54361e22f4629fd13e176003cec4f98/jezinupozutebodusamodeba.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d443a45ebd---xuxerobeguges.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160d092aa43497---49037608260.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=fundamentos+de+marketing+philip+kotler+13+edici%C3%B3n+pdf+descargar+gratis
    • 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_off00011c38.bin
95e3ddc10dfb3bf7f4bd1fb61ff84523bdafd0cb1ccaffe75b38093a1e758098
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C38 18960 bytes
font_01_sfnt_off00014c9a.bin
4c95e90be4c25b576d79228b5e359d28791e20fbb68ed771c2e6b3ba8adc9da4
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9A 11600 bytes
font_02_sfnt_off0001678c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1678C 16792 bytes