Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e7160ceeca16f3…

MALICIOUS

PDF

102.8 KB Created: 2021-06-30 22:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 863d6fa37d63d95634c205bb42ba8360 SHA-1: 2e36b24b797badbf3c3b0180fc0cd64455c03fac SHA-256: 57e7160ceeca16f376a84a469feb61f81a6adb4186dedc268a2241105391e0f9
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/22802170761.pdf In PDF document text
    • http://feach.ie/images/uploads/file/vusutibudujudunirezofaxa.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/96707323764.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072779ab36b7---femavofobenejedako.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d16a321c6---89783561419.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/nurubitedamexujefuginezoj.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/iqqn99ntrh9kmt48t0h9ru3p04/dinivomevaxuj.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef79fdc70f---50131361114.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/baragokeretanenovomaboro.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/4a56a2a25ea766fc435ac2d3181c31da/76636228609.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/jbsqtq9dda2qf8l1va0g2l9jrj/72110302416.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/3vb3bnnkv8eo5g4mp06oack76i/26744504391.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/f1ff8d466ee337efeca1210e7253cb95/paposafizozin.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/jenegom.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/a67a9f7a7d1891752648a850e3f305cd/78621791852.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7d235d641---visirejakamemugo.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de15902947---zulajoka.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9f601743---92747586321.pdfIn PDF document text
    • https://dannysacademy.com/ckfinder/userfiles/files/torutupunugijutewa.pdfIn PDF document text
    • https://zegabilisim.com/calisma2/files/uploads/palulafaxotewe.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/36043165490.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/7091160424.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/tebeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=darwin%27s+theory+of+struggle+for+existencePDF 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_off00012fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD4 11052 bytes
SHA-256: 88d8c1acf3906bd4dc21bcadd2ea263eb695711409917d27e1feb15dea34772d
font_01_sfnt_off000149ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000161bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161BD 17156 bytes
SHA-256: 1f4e4e26a8cae651fb1c26fdc7e8c24453dd8ca71c4642d9ce5be5efe0ebbd61

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