Malicious PDF — malware analysis report

Static analysis result for SHA-256 80df7f1d504b4aec…

MALICIOUS

PDF

80.7 KB Created: 2021-06-28 02:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c80f8f0d08dd6f1c09b81070957b1861 SHA-1: ea43be0c09a38af2ca5d68ca95fe9e3229990e18 SHA-256: 80df7f1d504b4aec26d24cc6251d17d73a53f5c9a00f42fd67d3583a5f205643
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/38697ce2f0c03c16ec4368f0a2b8a250/lajiririvoruxet.pdf
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/23524888305.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098cc0cb8a36---ziginipiwemusumawoke.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/70a79464a5f78c1dd229705318af3e5d/gefofuvesine.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/f93a237593171176e01c3dcfc48febbf/zikufedigajotudefasefew.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083909b78f9b---32056760161.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/31622441924.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b6d6720c3---27540831879.pdf
    • http://euro520.net/userfiles/file/162351269696336350.pdf
    • https://airtelco.com/data/users/_/email/files/bilefofeviraz.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a7c7aa0f3---74470688218.pdf
    • http://bonfiremadigan.com/uploads/fckeditor/file/savaboze.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f379ae2492---nugobok.pdf
    • https://ipic.vn/userfiles/file/kadanelivetefuvojazofo.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/79713981993.pdf
    • http://jakpaisanestate.com/images/upload/files/33653404056.pdf
    • https://grupo-kayros.com/userfiles/file/4702804881.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16075d5310db3f---48173233352.pdf
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/tajuniroduzitij.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/d23db56db6a24f2ef22a25563eb136e9/92523140551.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/24801854241.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=glimpse+of+hope
    • 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_off0000d9a9.bin
196fd906cc8f133ccba10a89fa0fa69dfa03ccef5a19c2efd632477086c2285a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A9 10200 bytes
font_01_sfnt_off0000f07a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF07A 16792 bytes
font_02_sfnt_off0001088c.bin
ec325f7c473763fce954979c8142ebed9502fd3c1f443f76b183fc0b21bb0cd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1088C 17592 bytes