Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd9e99e0a2503e9…

MALICIOUS

PDF

78.3 KB Created: 2021-07-13 21:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: caccdcf443ccf5a0c472a3cdd03e8e65 SHA-1: edf06e3f005a6d23dfcb1fcfb7782d6e62200189 SHA-256: 1cd9e99e0a2503e9672a7ea3cd67beda17bd9932c49da8ce9590b8881bdfb90d
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites that host further PDF files. These linked PDFs are likely designed to phish for credentials or distribute additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/63c4eb6c4ba4f60ef130da629b36c8b1/gesukaleridajasegebis.pdf In PDF document text
    • https://foulardfotografando.it/file/vabuwar.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/dejovasoforo.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/jekuginudajizizakoku.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/v7hu2681tgvg7hc1kjbu8284od/sofotakokikig.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/446f41dd4e8141f054a70d0ca85c3ca6/7833177250.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/bbe2593e303e4656dbb899d1e3d8c3aa/57798656795.pdfIn PDF document text
    • http://newtrierreunion1962.com/clients/6/64/64567561842b0bbd40b956adda0282a7/File/novutura.pdfIn PDF document text
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/pilizexesa.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/ff3tf54v7bgmj53c28ir1qi435/55988352512.pdfIn PDF document text
    • http://skoleniridicu-online.eu/ckfinder/userfiles/files/75088026174.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607205a466a0d---33421977231.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d190d77db9---gekupedof.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3a9a1fce9a4c7b24b409465af336648a/47135172976.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160842a6e172ca---mufonavozijunaxeve.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/63e2c6a78a0b0fb2ef190842d7a390e4/25278284113.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c39f091e270---zazugirovubi.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d7b6255ac---gogexalomonawemofowos.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094251fdc4f8---48151799392.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c15820582f---dokuwenisaxolupubumad.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/e2ad2772bce15fb243afc8f9753e5fe0/11015301266.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=two+sides+are+equal+trianglePDF 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_off0000d15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96E 16636 bytes
SHA-256: a6bf49354742f507f29f123b569c438d3be873aaa505d5fa67f2367aa574c638
font_02_sfnt_off0001149c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149C 10716 bytes
SHA-256: 5d539950a22fef4c902cf5277e5a536bb495cd62fd27bb8a9c1d4733bd88a361

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