Malicious PDF — malware analysis report

Static analysis result for SHA-256 9229962ca9b4a118…

MALICIOUS

PDF

208.7 KB Created: 2021-06-25 10:01:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: dfabaf63fbc5cb35aaa38a9b4e43deef SHA-1: 4d88a6dd800c1b39da8887f50dd8d9d23de485a7 SHA-256: 9229962ca9b4a118ec3955bc6bf543b2708514356a95e42deb49d68089beaeb0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://karimeh.com/public/userfiles/file/78491472481.pdf In PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/5349456681.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/36d4534e689747b6abf51a3d0991522a/xozowu.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/99051625807.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/40d6de877a7b949c0c64d60929d1d7fb/63222071705.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/t6cun89i1r6utiv5inmsebcmfs/55141674509.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/gfpm93mq2ma70l77seqakurl93/sojep.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/8694554552.pdfIn PDF document text
    • http://ridendo.cz/files/file/19564564036.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43803880364.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/8a8e33bad5c90a980503ea2488e3363f/83595891190.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a40bd2e1550---21454683044.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a705c3b8e45---sevib.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
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=denon+avr+x1000+user+manualPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF98 172964 bytes
SHA-256: bb736074171c6bebbb264f840346d677000d81e9e0fec45f3c579a27b8fa3631
font_01_sfnt_off0002d899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D899 4908 bytes
SHA-256: e3b656806b75f5efbd05d39ae9858340074b329fd103de96da46ae8969f1e77c
font_02_sfnt_off0002e933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E933 11536 bytes
SHA-256: 4441b9c989d0f568e928a873d382284c013a9e8fa16f90814775f70c3d13335b
font_03_sfnt_off00030f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F08 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_04_sfnt_off00032435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32435 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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