Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf2bd1b2b6c4616…

MALICIOUS

PDF

72.2 KB Created: 2021-06-29 04:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e9a60598b5ab447b6ee8d4facaebd292 SHA-1: ef38c364c791fdea46e001539307cc11afe3a9cb SHA-256: caf2bd1b2b6c461669f38c65e22036829d0161ad1951fecebff4c6f32445be1a
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://matsonconstruction.net/userfiles/file/jetifirajilibabuk.pdf In PDF document text
    • http://wf515345.tw/CKEdit/upload/files/rarixaman.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/1677105214.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/8842572443.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/e480d19ab4b9b944510af79c2ddf70dd/4305829720.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/pisolof.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/52440343265.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b5a69a1b2---jibobekanexojupolipuvu.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/semelemagatos.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d3f220e0c---6883720417.pdfIn PDF document text
    • https://airbays.com/userfiles/file/89575881973.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/9449689985.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/nabawekosepenukadasarin.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/32016977388.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbe2e64cf9---94479816679.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099b8df53ed4---74150834477.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f6e4f2d95---terawatuteneta.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/090f0783894beb0408653d64a1e5c814/17329698676.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/14033189423.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/5r63anh8ue8qijhir5ri7s453l/goridajegad.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/rhvt0tpu34u09tm1tghjd0me52/28014802020.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/ej3hvb1f9luftb4s4jd14nnje3/junazavokokere.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/5966745916.pdfIn PDF document text
    • https://ancoraeducacion.com/images/fuzesojodugesalubebeg.pdfIn PDF document text
    • http://prof-cosmetics.com/upload/files/42949817947.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=advanced+financial+accounting+christensen+10th+edition+solutions+manualPDF link annotation
    • https://bit.ly/2Syxq93In PDF document text
    • 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_off0000b7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD008 15732 bytes
SHA-256: 134c795a8aff92674813f9d20f758954eb213321f7509348b3f958209a3f4080
font_02_sfnt_off0000f886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 11244 bytes
SHA-256: 03793edf6a9e08bd8795fd5f88c44153e8e4d60072da04dc1d69ba8ecdefd261