Malicious PDF — malware analysis report

Static analysis result for SHA-256 3112b4f6734235cf…

MALICIOUS

PDF

88.0 KB Created: 2021-07-31 06:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cea13ebbc4478b2b79c80d1245a7271d SHA-1: ba9e370756a2c549bf391d3f728416806aaa5367 SHA-256: 3112b4f6734235cfc54dbf92710b0d495c35ad7e5e43f090df11439ddf73b817
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites. The primary purpose seems to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://philabc.ru/uplcv?utm_term=what+are+the+qualifications+to+be+an+ordained+minister
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/ridulivebonomefuv.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd1ad111e6---86679190477.pdf
    • http://winhazel.com/indigo/ckfinder/userfiles/files/nesojedimakoso.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d35186e0d0---sexojudasufigiwenoxitu.pdf
    • http://youngshiny.com/userfiles/file/1626171184.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdbabda227---buxovonunemex.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/965bbc6b50f31d004c7553ff567f2b1f/metekibuso.pdf
    • https://muratay.nl/userfiles/file/giweparopavexerasibozo.pdf
    • http://nfc.soo.jp/file/64023594946.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/89pkkf19qu072hdf5sqa9nsgj7/96660362150.pdf
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/86343055144.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd53fe1f10e---lulirojirota.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/q3sjl477rr8ssp5ham4jnnfhm7/9935407232.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edf0df58d01---zoxebamigudazosir.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/63aecec665e7527994cb447b31833291/89537999922.pdf
    • https://mmszke.hu/files/file/95533042681.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/7e4af2c376d5c77b22380cab60781ef4/mobojawunin.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a95fcd0b593---kakovoruvuduri.pdf
    • https://balaji-technology.com/userfiles/file/57280580597.pdf
    • http://alexlunacoach.com/img/editor/file/58831646250.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0aa0d7ec57---gixebon.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/e1645f352ab5c6b89e6ac931c3c86536/fevivinevego.pdf
    • http://niestachow.pl/data/aktualnosci_imgs/file/rinivabenukej.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/4bb008389efc2dafccf8167e1b915e9b/gufoto.pdf
    • https://travelone.ae/userfiles/files/guwojezalasiburefuzow.pdf
    • 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_off0000f2f3.bin
300e30ccbd74779a05f8a422f61a62a9bac249baacc0b304a00774011e478f12
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 11120 bytes
font_01_sfnt_off00010c85.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C85 16792 bytes
font_02_sfnt_off00012497.bin
debc183ea2fc7c2a7516977005c712629233a6999fc15738892eb65a0b3422e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12497 16884 bytes