Malicious PDF — malware analysis report

Static analysis result for SHA-256 e097531e5f32cb9d…

MALICIOUS

PDF

89.1 KB Created: 2021-07-12 17:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6387aa69eda57b1d7a5f2405aa16781b SHA-1: e6bd08b31bd498d14dcfe8a5386f2071e5473bbf SHA-256: e097531e5f32cb9d91f1248eea3eab27af5a2968ec184c8e9bf2a9d28028a0ca
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content or phishing pages. The embedded URLs, particularly those on compromised sites, are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/d166ba785b7da2f6aff2342f170e6d0b/tazofojizir.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc88d7984c---28681812807.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb6379b8f7---wariwusiw.pdf
    • http://fruitofthespiritcatering.com/clients/9/9e/9e5e3efd27976f294ade36eaf76108d7/File/purafaxosa.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/d4fb0417efeb3d053abe9a89963ae0b0/96389332908.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f5968418c8222afb353e6289060792f7/muxib.pdf
    • https://makiriaszto.hu/ckfinder/userfiles/files/mupusaxojobuboxurotafiru.pdf
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/dudotabajarerupituba.pdf
    • https://aawyx.com/sites/default/imageuser/file/73980919814.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d76665cb0b---komeremowivademafogego.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc63422c72---86820802706.pdf
    • https://adasms.fr/userfiles/file/jebosizutojixuwu.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/9f5957b924ee39eb94b848deace54f3b/27248988346.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hv28k4vmvi2uf8e2r983vj4bb2/guvurikizelixowikipogajof.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/5suigscueh9g669350f2dk6hr6/59429392478.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/01k6loa2tg3vjt4l148lqe4hhv/vosumowom.pdf
    • https://argentinaproduct.com/ckfinder/userfiles/files/89985400685.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bede752b5---94645291969.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083e2ff39f62---toxurisojotuvinisezu.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/d9q1mddrs1uqcb51cfudtukraq/lodoteliboga.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/tnt21km7uot2be07aft3sa6fdi/jewojuxavuliforojezoruv.pdf
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/17292377762.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b1506724f14---jomezexe.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b48354fc2b---nomalevuveriroxajaj.pdf
    • http://www.euro-fly.eu/userfiles/files/34693160793.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02a48c056a---popazu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=the+real+hansel+and+gretel
    • 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_off0000faa7.bin
169313e843f9a5735255523eaa66903a31044f142c5b9686eb73a31bc453d22a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA7 17552 bytes
font_01_sfnt_off00012832.bin
de7ef15f256a908596086fc137eb38c82176bd93c928ecc7011afcb1cb1f899e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12832 10276 bytes
font_02_sfnt_off00013f0f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F0F 16792 bytes