Malicious PDF — malware analysis report

Static analysis result for SHA-256 f488267f73bd16bc…

MALICIOUS

PDF

83.1 KB Created: 2021-09-02 03:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7f55c34b144bba4380575958dd6a6f1e SHA-1: 2b6ea228ccb8260ad8161d6841b7dd9cdf7c1053 SHA-256: f488267f73bd16bc326f806765a1358861854209ae096d8db680eaf325a7dde4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the ultimate destination. The presence of these links suggests an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8a864ea0d---97068870538.pdf In PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/6ba8d12dbd434a2e2b5c4a9679514b78/vetefijajopikuzigoma.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160892d001ce9c---kubavavefunonafuzu.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/kazutase.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/8662527144.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/3690116474.pdfIn PDF document text
    • https://profesa.net/userFilesfile/bigapefaluxefiledo.pdfIn PDF document text
    • http://trovas.com/userimages/44709271361.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/lefoluwi.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210703171038.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/zenapatimovefebipeki.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/d6393c.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/m0i7oil6c69k3ifdqu8hi5sjm9/xolimigadusiji.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/33436906148.pdfIn PDF document text
    • https://nitdgp.ac.in/uploads/userfiles/files/76358021705.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bc26bd4fa03---77433371384.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608985aa139c1---lofasofixarot.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/13247125019.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/pc5bbrbn7if3s8f345944mlbo9/vifew.pdfIn PDF document text
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/natoduboxos.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/93612846107.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/bobujutot.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/97873699588.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/rr3bv9gfcf4m89msf4h6nfnsg4/93013225221.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ee92a480a---1539317281.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609488d776dce---27562944646.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/85368048172.pdfIn PDF document text
    • https://p99.tw/pro_pic/files/wowopomawuvopuzixedu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=net+operating+income+under+variable+costingPDF 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_off0000e30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 11140 bytes
SHA-256: 32b91d4f1e8babd3b4670dc29c789b57bcfeee39d62e6cba9d3b78d317f30665
font_01_sfnt_off0000fca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA5 15716 bytes
SHA-256: 68901b32f4a80c5f3b38cb1758642f0837dda1dfa139c100d4a484fdd656a48a
font_02_sfnt_off000124e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1