Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe17546bbccb636…

MALICIOUS

PDF

87.9 KB Created: 2021-09-08 01:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1719ebd4fde31c53694c39c05cb2e8eb SHA-1: f9b746e9859a8e29835b830118a63a90c28e8092 SHA-256: 9fe17546bbccb63634ff84d3d1d68b2bf1f0d7485c95e37ebc8ece735be9538b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URI heuristics point towards an attempt to exploit user interaction for downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/jovawuwipuk.pdf In PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608480fa8dbda---nijiwupebo.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a6531503d---nirosireboxigin.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd352581eb---98648879766.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/fopuduwax.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/gulovexokumasenedufujijov.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/37252616304.pdfPDF link annotation
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d26522c4c08---jujalakoxajujaraginumipo.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/roxufatolap.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a153c6c19---zewagatekefogegujire.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/92031565394.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/96712513117.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3212da1df4---vugurof.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/40163489976.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/3041313086.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/17313996408.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/tuvug.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/fivokisalosatofasijago.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa11a77c067---47991760063.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1625711072.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608167deb03d6---lotivogufapoleso.pdfIn PDF document text
    • http://jngf.cn/files/file/wutazuzepivekitiro.pdfIn PDF document text
    • https://cecprint.com/images/file/75017375004.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/58428078772.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/da019e075c5f54ee348d6db0286f86db/tifusijipasoxe.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdc1285133---97871126194.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/7476728524.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/36339906684.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=free+printable+weekly+planner+2018+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_off0000eef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF9 18952 bytes
SHA-256: 0afb14864d9e20e115d1eb7c339cee8480be7a3861c9ba101621aafa4d3cb940
font_01_sfnt_off00011fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CC 11112 bytes
SHA-256: 3c599416a8ee3cfecc4c0130c5c1d9301f002ee4bbfc73c7d108e176790b8b90

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