Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47d1bac4324ffad…

MALICIOUS

PDF

90.6 KB Created: 2021-08-14 06:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ff7c493375f9857cf8900af88a06f655 SHA-1: 7a36d0ee23fe3176ee2b4ccc27f7bad70f93131f SHA-256: f47d1bac4324ffadb55b91186fa751e031769778538596d0c757d97180bcb6d7
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 WordPress sites. These URLs are likely intended to redirect users to malicious content or phishing sites, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier and ClamAV detection further support the malicious nature of this document, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763bbb9e719---42104770444.pdf In PDF document text
    • http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/jowiligepuxideg.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/59921990219.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/lufuneg.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b32fa78b215---45570388403.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca85a90a71---nuvuret.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/puxujozenejijuz.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/2100962511.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/f3ba05df616c57d9c1340634eafaef4f/zotuj.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/43173158760a7f9c4cd438.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/lexafugigogozefisefago.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/nusadoruzumix.pdfIn PDF document text
    • http://jew66.cn/fckimg/file/sexagikopidosafowimik.pdfIn PDF document text
    • https://medtek.vn/storage/file/19265103836.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/10fb1e24141b27720137c7156d0dd6e9/gajotixave.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/p74ns5uo0lpvri398mlccsf2u0/nibulakowus.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/38012018785.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/94905828044.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/52367974177.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/84870814382.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/sukux.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/xetorojomaxazibukex.pdfIn PDF document text
    • http://e-photo.lv/ckfinder/userfiles/files/16149498660.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/tijenepev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=14+days+conditioning+method+for+gamefowlPDF 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_off0000faba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D1 11156 bytes
SHA-256: 178e2e4eeab6670f673f56b790670ac3cdff93c66098ce33ff5a6eb72cf2974d
font_02_sfnt_off00012c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9C 17768 bytes
SHA-256: 2e206a93dbdeb1cd8d6d083a63ca09a201b3cf3ca72fa0e25888faac8e393c7f

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