Malicious PDF — malware analysis report

Static analysis result for SHA-256 2892114e26b7af39…

MALICIOUS

PDF

99.2 KB Created: 2021-08-13 09:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 60c39e836ae094c4668deefb9815a810 SHA-1: 2f8cae889f1d8039972cd8ebc4fdd68d733cf86c SHA-256: 2892114e26b7af3963608c87c6b6a099165b7867978080f63d5dcdc71a26ff47
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to potentially compromised websites. The presence of multiple unknown URLs suggests an attempt to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/ac952208b8cd23d00a8bc5c477f60ec1/zerufal.pdf In PDF document text
    • https://kuraniterbiye.com/resimler/files/nazutetevutot.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/36448799078.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/11984517616.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/birinikoros.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/1a53ebfe5ff5532ea476cf022a212887/5369874094.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfc1006610---nigiguxiwi.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096599a68c49---93029444035.pdfIn PDF document text
    • https://metal-et-verre.ch/ckfinder/userfiles/files/79941675032.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/lrflnbce7kn2rgpcsg2c2j3gmj/farimufa.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/2562878e0b603692d9fb6bb043224a6f/86303615965.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/dowiletozabajexogozulobe.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/73384009567.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/41866640651.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/jivowadagi.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161079041624fc---78336710094.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/8e17081e962fff482fcfaeebdb4a906e/6860910305.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820d07ad2d2---dubanodosiweju.pdfIn PDF document text
    • http://yilip.net/userData/board/file/bororafifadovijirekinoba.pdfIn PDF document text
    • https://notrepanierbio.ch/userfiles/file/mabewokesiraguxoja.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/5941de751414691bdc8790f879697979/boxeba.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/8690a846e2d93950e34e19a8fe64e364/82234997252.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=shklovsky+defamiliarization+pdfPDF 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_off00011906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11906 11168 bytes
SHA-256: f3a1d73516424a1fee5e3036eb4e271ae01527c12ecb5a4447b7418bf2d6b47d
font_01_sfnt_off000132fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FC 19836 bytes
SHA-256: a8fcc9083c572dca1cfac12ecb8a6fc10f5c51c08733238044856ee398c183ce
font_02_sfnt_off000165dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.