Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0ecd9e0b939d84…

MALICIOUS

PDF

85.7 KB Created: 2021-08-28 19:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a1fd505ddfd0596610c41f40950ebd2a SHA-1: fc5145977c1efdd02226afc38c2bae29948bc12f SHA-256: 6b0ecd9e0b939d843ce3e329511d66a2afbb96ef58358f0a239e49298dc7c302
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://businesslife.com/content/files/rividadeporamevew.pdf In PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/t8s0f1ilrkh5bstbrdo3jhshr4/6561264313.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/lumobazafakozuk.pdfIn PDF document text
    • https://milosislandrooms.gr/userfiles/file/senuwavage.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/52090614945.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/36211817481.pdfIn PDF document text
    • https://tantecoccole016.it/file/wumolalatukajemo.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/pisuligukemevazumuvemu.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/sekasawujegikojas.pdfIn PDF document text
    • https://ksi-system.pl/editorfiles/file/14963397424.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bed589d373e---21095761156.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/gonutobariromiwugokazid.pdfIn PDF document text
    • http://aimic.com/userfiles/file/2092143749.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/zezofesidagivubositazojed.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/9ji9h29s76f70kn2e8pg4qspmk/57575329515.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608631a4ba909---gajafuvobokasefev.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160f9825b1c57d---45914899506.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/6f9ade159bac549e7c3799059c3e89a5/29286781028.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/044b10668709bf797ad4cd7d17372fed/vawem.pdfIn PDF document text
    • https://cowik.pl/upload/71765601179.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/b04iltp9m5qra1s331cjfju6o8/81529390664.pdfIn PDF document text
    • https://pcstaiwan.com/ckfinder/userfiles/files/57726639551.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/lurixixabexenijeder.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094ced903efd---5365958271.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/sarefip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=principles+and+applications+of+tribology+pdfPDF 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_off0000eafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 11048 bytes
SHA-256: 44159dc80f6a919c1554fd23425bce6d55c045d6a3fe5dcf5eeb7c064d58b901
font_01_sfnt_off0001046a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7C 17264 bytes
SHA-256: b9b81c647a26eaafead32862d4eaaf6d5810f0331cec94819d51575c77f350c1