Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9b0405be558756…

MALICIOUS

PDF

82.5 KB Created: 2021-09-08 07:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 7abc13fdf11b9d4c42c67dc6f66d27c8 SHA-1: 086aa2dc13087bf284fb24fcd74b2bd133b5b8ee SHA-256: db9b0405be558756e4567a92349392c665dd9aac00e8c284232876743519775d
164 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=cpt+december+2018+question+paper+pdf+download PDF link annotation
    • http://bean2beenefamilytree.com/clients/60578/File/powibap.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/1c1lrrdhmjrl61p0giuak6iohq/dugipefot.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/56821008410.pdfIn PDF document text
    • http://ankaraeksioglu.com/resimler/files/rokixarugelimutiku.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/fe5g2hta91ngkp1h9v6ifhu6ap/lavikuweduzudameto.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/sasupuvaduwadome.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/vosejigepewasefamawo.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f2164ad478f9b7b5ef2e3c28d55bcc4e/16841286713.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/d9a537e983e2cfd42d49c3391f9e3464/15493131447.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/fokodopetiwafixarajago.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/memulisakaf.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/99560190277.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/57069713737.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/8eec917037fd60b610d87ce514e786f0/zofatokaxojiwes.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/13ecfac9ca0bcf829ab4d7c9ab880b84/47382112119.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/zixoxuxin.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/24222663833.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/75927765409.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/bbbd1bca96d44abea870c151fcbd4884/lelusobaro.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210815_C26BAF74C696B483.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/db4e5da1e2e94ec33c33e76b0ebf4346/degosuzapos.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210823_11BBA85219A06B20.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E7 11784 bytes
SHA-256: 40d8f3ced3e152364b07c2781b60e9ed32bdfbde189887802a9e316187bba0d1
font_01_sfnt_off0000f2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BE 18424 bytes
SHA-256: 1db02cd97ad35f28690079d43c2492877443743e7780b8acff5eec41a4bb8c96
font_02_sfnt_off000122fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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