Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94a73fd37f0343b…

MALICIOUS

PDF

85.8 KB Created: 2021-06-26 00:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 36550b62a3d709d09a9bbc5fc42735ce SHA-1: 9aa1638ad61bceed0e0bc2f743e11c269869cdda SHA-256: e94a73fd37f0343b5736a33d05a307aa8d525413543d1e6c648eee540a0c27f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. Heuristics indicate the PDF contains a link farm pointing to compromised CMS upload storage, suggesting it directs users to malicious content hosted on these sites. No scripts were extracted, but the presence of multiple external URIs and the overall detection profile strongly suggest exploitation or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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.rockfallco.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8faa4acaa---kuzamu.pdf In PDF document text
    • https://allcreaturesinc.com/files/files/zejumidiguvowotabed.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a06641b1c---62323590384.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/73139503233.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089c2e81e674---58740257535.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afc5b678d36---meruratesunagodukezujoke.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/72525117498.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/93671752044.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945801c1332---85911345691.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/77e7233ecb017ddd7c753a61c935cbfd/mixozodino.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/nevewojudaxum.pdfIn PDF document text
    • https://adikketiga.com/contents//files/95386906151.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/dd8ggnb9m20v5eilm5hau4mfc2/60328939505.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/39b8493cf1b024d8c254492a1bc58f2a/nivutud.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/4augnhfe3hqhv8jvc0mtd4fci7/riguzonevomebu.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/33089611972.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/28880317077.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608069673aa24---mitulipimewidepijo.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4bec0acbc---nakasozugigotiribopuzame.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f487085c51---73923017720.pdfIn PDF document text
    • http://fullx.net/files/88563831931.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607debc4597d0---34188746113.pdfIn PDF document text
    • https://easybuildapp.com/files/uploaded/files/42421976998.pdfIn PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/debukutijatonobadu.pdfIn PDF document text
    • https://ivaco.it/file/42204567003.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd46c10fbfd---83753209302.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a31ed8665---4207682756.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/31212499895.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=watch+black+panther+free+streaming+movies+onlinePDF 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_off0000e94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94D 11216 bytes
SHA-256: 891d23090b6b68721c460ef1f9c54c381caa0d4c83989441da61cdf2206fa889
font_01_sfnt_off0001033b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033B 17720 bytes
SHA-256: d9eb783d12d3530672f117795724be5127f1494229d8241820f72fb5fc37cbd8
font_02_sfnt_off0001317a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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