Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb64d08d1e65bd2f…

MALICIOUS

PDF

94.8 KB Created: 2021-06-29 05:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: bb5a3f574a888dee113eae73c5ff19bf SHA-1: 68f9c6c4b24bb3a50a02e6cb0a24bd96e30d4a0d SHA-256: bb64d08d1e65bd2f29f8a84fea3d542979997e75b4a7f539723dd0ba989dc9a0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. Additionally, the sample exhibits characteristics of a link farm, with numerous URLs pointing to compromised CMS upload directories and disposable hosting. These elements suggest the PDF is designed to redirect users to malicious sites or download further payloads, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://bielwod.com/userfiles/file/mosukekufemeput.pdf In PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16072e9522aa02---11690172418.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/96417290440.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088bdcd06f16---diwurosejilipo.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/j61molfo0mgi9aj53uspkekhp4/28327037972.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607689b40a55a---76511041765.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/17809844883.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/fa5c2ebde98ad190cf5ae62d27301f78/29803616449.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/kkhf7vqs4e2sgf70ilgnruoo8d/13170528529.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/zavusalokimakav.pdfIn PDF document text
    • http://canvangdientu.com/images/file/tesudeniketiwi.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/i9c15tg3ju0qoh4m4sbmqbehuc/18968476855.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/1321821307.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/xazafijiroxipal.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210515/file/34425188455.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/cdd3c1261f7dfd8da4d1b33bdf9582a4/pefuwon.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/1a9bc8601f7f3f863ace57f12619ba39/sodilokewawa.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c520bab24b4---81822412846.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93a0924c0---gobotej.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/bdf8735542c2b5e874d9cbfdba5426dc/83446426776.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/fofoxaromereve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=daily+confessions+websitePDF 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_off00010dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000125cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CF 17780 bytes
SHA-256: 6f249910485146fd470e37f54a9dab31bdb945dbbd4c0befb645384d97c71ef2
font_02_sfnt_off0001546c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1546C 10572 bytes
SHA-256: ee0e1facd4debf5f212d82058172b954702669e7b793cbda1bc98f9bb94a0514

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