Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b44f8c423146ca…

MALICIOUS

PDF

73.4 KB Created: 2021-07-27 07:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 02a4b969bc897950cd536a112a5179f3 SHA-1: 1282a07a826ce315664364d226bce78217f06a31 SHA-256: 61b44f8c423146cabec7f8bf767e3262674e4b4a7feb31d705b19bd8c2614e2e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for Pdf.Phishing.Trojan. The embedded URLs and link farm heuristics indicate the document's primary purpose is to redirect users to compromised websites. These sites are likely used for phishing or to host further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6282

Heuristics 5

  • 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
  • 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://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607007ca5189e---toxikufizenas.pdf In PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/8252cda4139ea0043f216da5ad83a054/24594140343.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/efff068c2203ee1ca12f015568f388c5/87687359408.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/5a045a8fdf56cbd4716bf1f01c8f0761/sawovobopadirib.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/dazexom.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/917f71815466d8a6429d07a6e7c1dcd2/27296183823.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/58bf3ad8b7f2e2730c179a72890a72d9/zivawexanijekiveb.pdfIn PDF document text
    • http://planbmedia.hufiles/87956579091.pdfIn PDF document text
    • http://chatsworth72.com/clients/5/53/532ec3c8dc0e95779814939736d4df6d/File/11274576476.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/kafuxilonevoj.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/6077442611.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd84967f7a---82914701779.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822b19bfb41---88758436243.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607449ceb4593---1184019084.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/winojatuzomudile.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/meroxirura.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/h13mk4s4ukdn85ijurma3pvp0p/10342281811.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/65680552229.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb5910c797---midutinanozupizagadenesif.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/38257589193.pdfIn PDF document text
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/ruzoretuxa.pdfIn PDF document text
    • https://retta-bg.com/userfiles/23422811161.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/tisekezekuzusab.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090258ecd9c3---93496896543.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=ram+leela+hindi+songs+free+download+mp3+pagalworldPDF link annotation
    • 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_off0000cf96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AD 11148 bytes
SHA-256: 7f8197c02015d039854fcea2f735334792bd84d78b17f8ffa3a64c99cdc2524f
font_02_sfnt_off00010157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10157 16612 bytes
SHA-256: de3075be1bbf994f5a2abb34e1f0b7bec9544a938cc973b70fa2b505c0db6b83