Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ecab0118db1c932…

MALICIOUS

PDF

77.9 KB Created: 2021-09-19 07:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 59c508e2bf601e954ec02b4b09818a5c SHA-1: 48121db0559e1d1677e60472c3b53a37dca57f3b SHA-256: 6ecab0118db1c93200834272f13137b8d1dfb1bd7a8b2d8efc7b5683260a3dd2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://summitremodelinginc.com/userfiles/files/lakumeletamoroguvupifejoj.pdf In PDF document text
    • https://cahayamimpi1.com/contents/files/rebigaro.pdfIn PDF document text
    • http://ziva-muzika.cz/files/file/11084793301.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/29587337535.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/rojixajazezedalulet.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/99592002933.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/gapetul.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16048501505.pdfIn PDF document text
    • http://hefei.chinatupai.com/web/js/ckfinder/userfiles/files/51033210764.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/zekimize.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/43406839007.pdfIn PDF document text
    • http://skisun.it/userfiles/files/91237738791.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613750b080e16---waritujalox.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/sebaxexumorizuviwepefepeb.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346c01a8947---6163496763.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/suvogofajidudaku.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/97bb216d3e85972ce280c931d12f6545/80491734145.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/161447d2924930---xakotede.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/keguxiferotufanalavegon.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/powatanuxowijesibixizopom.pdfIn PDF document text
    • https://sanidom.pl/img/file/fozipemofunuzewojolinora.pdfIn PDF document text
    • https://letajicikoberce.cz/userfiles/file/59435226434.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/o930iuhuiii6fa3fgcchtp4tvg/lizomafesanunemap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=android+wifi+password+cracker+appPDF 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_off0000cc9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9A 10628 bytes
SHA-256: b44e14bfeeb22a61262bd1ede2ad12ac61ad6534ddb067ecd16f9698d062488f
font_01_sfnt_off0000e522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE522 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD34 17232 bytes
SHA-256: d927f84e7d98107aa0c101b6eb83f8f0faf798622bbb9fda06e1d77646909c07