Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8ffcedf0fd5688…

MALICIOUS

PDF

87.3 KB Created: 2021-09-23 17:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3c3a06af1fb30fa50ecaf91a3d451b20 SHA-1: f791f4444d29430c25cc883c7ea1936f4bb741bf SHA-256: 2e8ffcedf0fd56884f7096974689c3f9d8b7f415d31a09ccabd36f66dfd79a1d
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised websites, forming a link farm. Heuristics indicate this is a link farm designed to trick users into downloading files, with one heuristic specifically flagging it as a potential phishing or trojan delivery mechanism. The presence of a 'download button' lure further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=harry+potter+1+full+movie+in+tamil+download+hd PDF link annotation
    • http://sakuragiramenandsushi.com/uploads/files/wevekemawapisedopu.pdfIn PDF document text
    • http://zvaracskaskola.eu/editor_uploads/system/files/99957462824.pdfIn PDF document text
    • https://emenu.hu/editor_up/6429077176.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/katuvegawavituzopiz.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16141fc9b194c6---wadupijiwikovobugakisewi.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/4e1587cc325760b6fe55d5b6e439c6c4/jazuno.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/padufivejivexurivarukelux.pdfIn PDF document text
    • http://bilcafe.it/userfiles/file/34557689380.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/kibot.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/74466416660.pdfIn PDF document text
    • https://mkontroll.hu/File/vugolu.pdfIn PDF document text
    • https://ags-car.com/upload/files/zefusoxetatikokewok.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/34816983467.pdfIn PDF document text
    • http://ngocminhcnc.com/demo_thietbimay_24_7/upload/files/vitafutonolazugisixu.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/91644877790.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/bewilisuwubusimegomomaz.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/161419a7bf248c---rovigiluvelera.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16145c04c37f88---10330759256.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/40613625985.pdfIn PDF document text
    • https://ecohort.biz/userfiles/files/wesawiz.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/memusonovugoje.pdfIn PDF document text
    • http://screen.by/images/file/lejeruzosaz.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614389b869d11---witami.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d1025f5b3---sixekusukesexaze.pdfIn PDF document text
    • http://zatacorp.com/upload/files/koloxojokenape.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161316e00aaa5f---pilimuma.pdfIn 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_off0000ea22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA22 19500 bytes
SHA-256: ef23c0714f9054e86df09e2b11bfaf0caa5b9d151cd18e55c92f355a2991ef33
font_01_sfnt_off00011d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8E 11004 bytes
SHA-256: b8b3ec7c5560acf50e2afa27203350e64ab22d03ae6091bd25452e0ae2ce6651
font_02_sfnt_off000136f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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