Malicious PDF — malware analysis report

Static analysis result for SHA-256 a82222884876c4f7…

MALICIOUS

PDF

120.1 KB Created: 2021-08-21 07:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 290fcedbd5b2a84068163d8f16ee5d5e SHA-1: 567c84ef3e39d54faa50ac47d7d282ae05eb46ab SHA-256: a82222884876c4f7230e156c73c5bd613afba2ad0e7525e81a2d2a5c182e4911
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, consistent with a spearphishing attachment delivery method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/59a8cc2e4257f153936ff2b5078dd81a/87906374728.pdf In PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/75765387471.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e52af842962---teniwelok.pdfIn PDF document text
    • http://ilkemymm.com/image/files/31615044965.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/77706252779.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-8-2/20210802064951461830.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/c2dgnmqcoqa83iu96ra3d1t6qt/98856534417.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/pivosuwirojavuxuvola.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7fddc11bc---76901231458.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072b82505108---74558256334.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/zexibedakarujavawi.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/babalidudapevo.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/fb78fdeb3a80e69d6854c47e4e074e52/85792627070.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/mimojadiwef.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160862ff57ff53---fomanameruveg.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e090d53b4f---lasazuvenaxufixemugi.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/97870768691.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/ca9d05d9a55be4cc3233ebcbf310ce6a/4532105121.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c8325e143---83851731734.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/21919140185.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/nubanufigudobogajali.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/dcsoillslovbigsrea9hoajfe2/tubizepuluwugujoloji.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/zaraxag.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/55540633149.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/79070984191.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210706_61F390D6293B854D.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=black+and+white+romper+babyPDF 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_off00017864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17864 11096 bytes
SHA-256: 91580c076d2c0f7cbd18fc7daddd55fdbddcc7f92c3d78d8441d6fc310b2c901
font_01_sfnt_off000191e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191E3 15708 bytes
SHA-256: 45b2b8699a5363fc69a8892ccc72a486c67686c0448d32352ae5aa90b618bfcf
font_02_sfnt_off0001ba45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1