Malicious PDF — malware analysis report

Static analysis result for SHA-256 6280862a0053928d…

MALICIOUS

PDF

90.1 KB Created: 2021-08-01 08:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3b2da0185c1ca107f45f8163e6f7c247 SHA-1: dddf422c024d626ecd31c48b4b2b8fcadffdda76 SHA-256: 6280862a0053928db36972a564f91ae694f94198ebef67fa4d437bc46c2b902c
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The PDF's structure and the presence of multiple external URIs indicate it is likely used as a lure to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfdabddc06---gilikuverukobuxarudade.pdf In PDF document text
    • http://davidlbrooks.com/clients/868292/File/fikiguvatijupinu.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/50614272060946dd9f1680.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/wogozegi.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2401ce633---zasuvofuvojaxobomamugupa.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16072a21cd78ab---53067157376.pdfIn PDF document text
    • http://shiokuda1.com/contents//files/wizoforijariduxurewip.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16090108d266f6---8423056255.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b21bd1f16.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/28966608738.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec58099ee6---neravisefudojujalilawiju.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f57951297---mofulebukufaranerapow.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021062609302184.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b016c8e4c---mazabepuzofesa.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c899a8a9fcf---30550091680.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/37829065563.pdfIn PDF document text
    • https://atlanticcompact.org/userfiles/files/powopajo.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/mopatufotinosevisobetip.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/dotaxomapo.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/660f3abad11195d1412dcb5e3ebb90f5/lodirekiwu.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a4cb5984f---xizatutajunidase.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/29278554881.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/372eacbd660496e6676716beaa41a345/kegif.pdfIn PDF document text
    • http://aven.su/userfiles/file/guxadodesokugojazisuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+pair+jawbone+mini+jambox+with+iphonePDF 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_off0000f962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF962 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11174 18204 bytes
SHA-256: 6b429e0f892807df3737ad0ad94ace97ffe2bd0de0af4a3594c129e3ea4714c6
font_02_sfnt_off00014127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14127 10752 bytes
SHA-256: 37f24bb2db3c8f02d37bd1b378ae9710433f883372e5d1989823470ea4946a0b

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