Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eed1113ce55f071…

MALICIOUS

PDF

78.9 KB Created: 2021-09-05 20:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d1aeab67a3372eb6e0185303edb5ef8e SHA-1: 51cac53dee8bca7bd45567ae61871e512f6befd5 SHA-256: 2eed1113ce55f071f95fd65de0a9fc7383fedbbbc0ef54953f883551a6e612a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites and link farms, suggesting a phishing or malware distribution scheme. The file's structure and the presence of multiple external links indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://huntic.ru/uplcv?utm_term=wheat+and+sugar+a+comparative+advantage+worksheet+answers
    • https://intrigantka.ru/images/userfiles/file/visosejodabi.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/0eadddeea7ca5ec65b05813f3cdf6052/xubadipeg.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/uoref4evg8p2u7p2ks1e8fmlsl/67919826199.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/df7fc30fc2e0d186e778e4eb49948211/dalorugu.pdf
    • http://leebyunghun.org/new/upload/board/files/94728267010.pdf
    • http://grandchainfamilyfoundation.org/clients/85333/File/25492165416.pdf
    • http://op-gold.com/ck_image//files/ditiligitu.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/bffcfe658d50e81aeeb9b9b58129fefe/83005189482.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/343e2de5d5128f687840de61885ace7e/68906915912.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c868d2b420---44104148331.pdf
    • http://aarogyamedico.com/userfiles/file/3841712236.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/951e17bd8069ac9ae9da2d59807887dd/42379142173.pdf
    • https://feng-shuiworld.com/userfiles/file/59704833792.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/q9ab37m4trr7eat5qqqa13ea13/sufigunok.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/hrph5d5drrnh6i2plvk6bmaqr7/47214438777.pdf
    • https://davidfoleyinc.com/userfiles/file/pajesuvodirasolilebojimom.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/5045655237.pdf
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/50935064307.pdf
    • https://lawina-radom.pl/files/file/supuxep.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849923bba71---66597580235.pdf
    • https://die-elke.de/cms/elke_page_files/file/86078720460.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/5956c0962d06ae2571dfc6352e429397/5325035965.pdf
    • 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_off0000cf43.bin
4fe2296c58106c57d445a7eebf91cb7ce0ab00ea51e04f4703dea762a15d2ae1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF43 11252 bytes
font_01_sfnt_off0000e953.bin
0be1652866eee16d4aa4a58771a8130927b42b9c7d6ce6a648f038f79de85173
pdf-font-stream PDF embedded font (sfnt) at offset 0xE953 17144 bytes
font_02_sfnt_off0001157f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1157F 16792 bytes