Malicious PDF — malware analysis report

Static analysis result for SHA-256 2222e735c9e7a54a…

MALICIOUS

PDF

88.2 KB Created: 2021-06-27 10:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3fcd0b5d7242d6213978f2ccefdb2130 SHA-1: 9cbe8604f2fadfb90d8a1314b1617f7ae8430946 SHA-256: 2222e735c9e7a54a5ff3308bd1d81778ca0d7c57427371c6aeb6eaec43964c38
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload sites and other potentially malicious domains. The presence of numerous external URIs and link farm indicators suggests the primary goal is to redirect users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609494c9481f8---36719664812.pdf
    • https://avenue102.com/uploads/file/72770460489.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1608600eb24987---basasevunibefona.pdf
    • http://gelateriacool.it/userfiles/files/jofenaj.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/1a0ecb794d3c9b3be380091fcabee565/42511268171.pdf
    • http://ipceurope.eu/assets/file/rupexifanotu.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/3252b197ecb39f14e5b0c81ff08780d6/bipuv.pdf
    • https://bahamianbrewery.com/ckfinder/userfiles/files/66104307118.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160af9a723c835---neborewimirawewaxab.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607697f8cda93---sidura.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/s9jlrfev0n65mnof314afdmlpm/25486342012.pdf
    • http://macautemple.com/userfiles/file/nemupu.pdf
    • http://mim2010.ru/userfiles/file/mojigobumefodetid.pdf
    • http://autosoftware.company/autoresponders_images/files/40171719574.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/245361db9eab214102b6b0383c815468/46166624397.pdf
    • http://aliceinformaticasrl.com/user/pages/patatixozemakamasofadofu.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/58448755283.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/a78f962e6cd0494a15701eba08ec0a91/watomuxi.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/cg0vk3ovlotrhgd2p9fea1oj67/97616018464.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/sqt49vabtkoiff3buiak1vlhmj/dogisexufevazafupifoka.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607faec9a256d---fijamivizaz.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16073a36a7a007---mumelovibatepebukevuxi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=first+foot+worship
    • 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_off0000fa05.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA05 16792 bytes
font_01_sfnt_off00011217.bin
41b0902d2a2e2e5a1f4e5ffe9937d73efb4c81eaa25c12b6d28186ed8db15521
pdf-font-stream PDF embedded font (sfnt) at offset 0x11217 16676 bytes
font_02_sfnt_off00013d8a.bin
26f4d3873df761be902896244196cdfaffde8274e3550e6f578443f5635a26ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8A 10076 bytes