Malicious PDF — malware analysis report

Static analysis result for SHA-256 217b0fb2c32c5e07…

MALICIOUS

PDF

84.5 KB Created: 2021-08-11 21:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 45c4ce4466f4586958b61e71bf79f77f SHA-1: 2d9b3da516d212e9e83a477b6937211414da09bb SHA-256: 217b0fb2c32c5e0785682c6db8263d879fff7285895daa16487717dd63e08eb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised WordPress sites hosting PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/n5i0olkvmp9jqt6ov0b2hi3fnd/wakavaxisisemukamu.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1549d92d0---mobedulufewepikupapi.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdacb2bfd4---paneju.pdf
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/fojovosapekasazinukonozo.pdf
    • https://machnhaduong.com/images/uploads/files/zaberuxalejimonoxewazubi.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/l0g29h52sgu7sefpai2cr59g74/44858342731.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63db6f1139---9699075156.pdf
    • https://chilegastronomia.cl/uploads/userfiles/files/satufezawa.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a35cad43b98---55210911318.pdf
    • http://angelcabrera.com/FCKfiles/file/39020265808.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160a53d2689a27---14621909659.pdf
    • https://butchercurnow.com/img/shop//contents/tatux.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607013c63c479---vovigezimobukuzen.pdf
    • https://doktor-ara.com/userfiles/files/zunedidazuvax.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/74a6bc5f46798b170e2f519d35790cec/28297714640.pdf
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/sizojebofefud.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c044e643f---dosagoxi.pdf
    • https://anjingliar.com/contents//files/serezelowulofukowoluwi.pdf
    • http://midel.me/userfiles/file/53735494688.pdf
    • https://die-elke.de/cms/elke_page_files/file/15279633732.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ee7fc28ebf2---wotuguwoxorakajiluxivivew.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/1b49936511a0b23d8c11f93771ca72c4/vukumixedanefuno.pdf
    • http://gialtour.it/themes/userfiles//files/japitisikideguxa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=what+is+kohls+30+off+code+for+april+2021
    • 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_off0000e2e3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E3 16792 bytes
font_01_sfnt_off0000fafa.bin
302e2d3cf00191477ad56f2dc075e4043284e240e2787006e4e99c9e0e97fcb6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFA 11164 bytes
font_02_sfnt_off00011557.bin
03383ae1423fd99d9a33a26af1f6a6749e021c080ff0915b505505d3e1f210a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11557 17708 bytes