Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0f72e825a6a297…

MALICIOUS

PDF

84.2 KB Created: 2021-09-19 21:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a7f230434cd65ed874082f0dadcf5463 SHA-1: 02b71c9bfac5f3abb5eeab9169b8271dac719e4a SHA-256: 2f0f72e825a6a297215324938eb9becf1e4c8a5c4881ebcd802ea2ff5fb6c73b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress upload directories and disposable hosting. This suggests an attempt to lure users to malicious content or download further payloads, consistent with phishing or malware distribution tactics. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cocoon-source-harmonie.fr/public/file/47609710397.pdf
    • http://fitviewer.info/files/file/98917429968.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/9722eab2288a15c1c8071f1e844f06a2/rugifuxeneluwopixaj.pdf
    • https://magic-ray.shop/uploads/files/83001535126.pdf
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/katog.pdf
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/88958581570.pdf
    • http://jinwoosmc.com/userfiles/file/salijobam.pdf
    • http://tlznailspa.com/media/files/vuwolinexu.pdf
    • https://h16hr15k-h19hr37urn.com/contents/files/vukafujoliw.pdf
    • http://vasekurzy.cz/userfiles/file/fowujefepuje.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/0b18bd9e4eabf7f5081c734587295a44/19387838231.pdf
    • http://marchmont.ru/imgs/file/51148917024.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613504ee77c2d---73534247919.pdf
    • http://mishelik.ru/userfiles/file/padoteriporexekok.pdf
    • http://hglobaltour.com/FileData/ckfinder/files/20210907_3B15D8F8CEA500DF.pdf
    • https://bookmyexcellence.com/bookmyexcellence/js/ckfinder/userfiles/files/54452599367.pdf
    • https://rewaqousha.net/userfiles/files/75733034829.pdf
    • http://hondatayho.vn/images/ckeditor/files/lozovijunesazutif.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613334a30aabe---47720550411.pdf
    • http://twozonechickenlasvegas.com/uploads/files/72710064664.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5814b3991---21814880579.pdf
    • http://rockhouseschool.com/rockhouse/uploads/files/finawolakirilejupiso.pdf
    • https://kawanmto.com/contents/files/85572187574.pdf
    • https://tannhatviet.vn/upload/files/tidipigijakawoban.pdf
    • http://svaz-podnikani.cz/files/file/kujagafomudapukino.pdf
    • https://altstudio.be/app/webroot/uploads/file/tikowisoguwurigekafo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=smart+tv+mx+player+download
    • https://www.thc.gda.pl/ckfinder/userfiles/files/rakasumenivitibodo.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_off0000e541.bin
d7969b58adf250194930cdf944e7982c72ee03e3ee78faf528624358f130bc25
pdf-font-stream PDF embedded font (sfnt) at offset 0xE541 10736 bytes
font_01_sfnt_off0000fe04.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE04 16792 bytes
font_02_sfnt_off00011616.bin
2ee9b61524403c74b22600cfbd7beb0d5328e13272553f65b1e5b9ebc3dbf68e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11616 17408 bytes