Malicious PDF — malware analysis report

Static analysis result for SHA-256 6044e13319433429…

MALICIOUS

PDF

80.0 KB Created: 2021-06-18 05:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 627e0fad65a88075e24b598555aba6b8 SHA-1: 967f8c0e15fdc74bc89c034e31376dcec494ee9e SHA-256: 6044e13319433429fabbc97b3446b636678fe619740027d315b82c5e601157f5
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://archism.ru/uplcv?utm_term=the+pursuit+of+happiness+full+movie+download+free PDF link annotation
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/9a7d3g50hcopq4l4qdu048h8hv/xomunuvavedamebibowoli.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/e1b54a28538e5c99f0ffc8603ebbf8ad/88640486643.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b83324af40---paruxoxo.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8eb4508f6a---rukagugezadumuzilek.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/gafijirawabu.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/59678010631.pdfIn PDF document text
    • http://penzionklara.cz/userfiles/file/46190383798.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607603e6cf8a9---fuvuposifakilijukavapa.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/9cbb7290fd549f3e20f9f543e41504fb/nififuvidikajozogik.pdfIn PDF document text
    • http://vce34.ru/attachments/file/31237796750.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/namerurodo.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/c5bc4b239641c9d2b3b13016fe96a72f/xasamokepe.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/16244757954.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/tisokubagazoxuvo.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160895c19f1b81---fonote.pdfIn PDF document text
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/6f04770f48bdfcae48ee0d937c49f84b/zusimojetegududefenodafof.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/93490599750.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/49536653831.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/0aeff1df9163561b397851cef3adb04b/refusiwikiv.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160921fd52ba68---bafireden.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0B 5264 bytes
SHA-256: 9d2818012cf2ed68560499a812d1e2adb753a64743406420b253b39baf5b9ebc
font_01_sfnt_off0000fed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED3 10952 bytes
SHA-256: 0d5fd60fa5b89db20e305f3c9e43380250efd9e53e7b5422927d0af291d54c06
font_02_sfnt_off00012413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12413 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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