Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a83594c9ed6461…

MALICIOUS

PDF

98.9 KB Created: 2021-07-23 23:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 292e17357308e874b8c07e247fccf4b8 SHA-1: ba81131d9717a7d39d27d709ac7089932f6e175a SHA-256: 67a83594c9ed64617fb9e51fef4698d7bd2a7b023bdb33ff6d32cfa64ae02aca
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The presence of these links indicates an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

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 http://iltorg.ru/upload/file/wuxemidugiw.pdf In PDF document text
    • http://fkhd.cz/data/img/vipes.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160874d683080a---mizatifixon.pdfIn PDF document text
    • https://kamarkosong.com/contents//files/fuvajepepedetediwagojijaj.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160af8018294df---kukubisikagex.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5e84b8ee5---5829424795.pdfIn PDF document text
    • http://qqsbg.net/uploads/file/41029894703.pdfIn PDF document text
    • http://xn--h49al71atridzo.com/userData/board/file/72883609572.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/doxuzarawelarexefozet.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/66587284734.pdfIn PDF document text
    • http://misspacificus.com/clients/873634/File/tufebanib.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b716cd80f---75178280510.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/16666598826.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/rasawadofukexabezis.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/0e6a50e75392e1e7ae0b5176a286af65/pizapefolojobixaxiderinaz.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/19a11b006179d2a6c60f6ad1164b9745/magugi.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c15eb6cbb2---67876175864.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/ee5cb6c36fb8595ac4784d02d38609c5/zasubegemenozik.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9dca1275c---mamowukotuxizilavoza.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/16281376207.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2029a9bed---patinilabuvipedes.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/95890054986.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/wenexoxipotuna.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/077a1588cca722f1c59b21651d77d974/xarejerapixuxuwebaju.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/37710742070.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872faa1904f---47998012149.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+set+up+an+ozark+trail+10+person+tentPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8D 16928 bytes
SHA-256: 3119fa3332160f4a045cca9a9f8bf1839b38a7ebe7e70638234f0e3e39b6319e
font_01_sfnt_off00014b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B86 10748 bytes
SHA-256: e71515b24a926285b7b2d2c420cd71ebf0b4509632c5b01cc9ecf5e6ec754cf7
font_02_sfnt_off00016474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16474 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1