Malicious PDF — malware analysis report

Static analysis result for SHA-256 352b6edcbcf7f330…

MALICIOUS

PDF

74.3 KB Created: 2021-09-07 18:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 74d44ca7e13171ad749fc36c0358aa6b SHA-1: 523eedf298758e9571fdadd6db211c34c61dffaa SHA-256: 352b6edcbcf7f3302fc1edee6a9624a8f26f12180cc93c4a7768ba93d5a35598
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and link farms hosted on various domains, suggesting an attempt to redirect users to malicious content. The presence of multiple compromised CMS upload links further indicates a malicious intent to distribute or host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 https://coretry.ru/uplcv?utm_term=english+file+upper+intermediate+workbook+answer+key+pdf PDF link annotation
    • http://php-lounge.de/userfiles/file/74929455387.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/wababaripenavinutodu.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc379f2eeb---40643222259.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/9946966428.pdfIn PDF document text
    • http://elai.kz/upload/2021/08files/2108310519509741889gfag.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/191564706b9e314020c29e300d6c2746/fazatisapitafaduvab.pdfIn PDF document text
    • https://trunglamdecor.com/uploads/userfiles/file/mizewozukigexotolew.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/23434032866.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16081a48ad3707---jolelabasa.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/8037340674.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/b96aa146a75f3711193291cccbfb8ba3/66082929946.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/voneditefizoxe.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/93598778034.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/88bbe971fd58d3d6e0f49e92f388e657/10739220471.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/91482661662.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/1f7882bb5aac0dbff9e9c811a54391a9/fefapikogotaxagiwedosawip.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/a11d27i5rqdo8s54nuge4ff4a0/lulologokomaruv.pdfIn PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/kawubajugalupasenarineka.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/21611917974.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607981907c45c---40049186095.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45213811892.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/winifufonesafa.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/cbf98ebcd1fe4950b36d377979c171a5/51630832832.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/12896388791563cd06d0ec540846c6aa/golosuwatifofarulimuj.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/87389397179.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/valobejalisixegilavaso.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000baa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BF 11460 bytes
SHA-256: 4ffef9ed44b30d6363719b09ad69677b4c893893e9cc8632b07a7aa9666e6dd8
font_02_sfnt_off0000ed41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED41 17836 bytes
SHA-256: 8dc5c0f8bebd0d3511b5f4016efb06dff5eb9799f412fd7a5d2fe7741ea91e72

Open this report in the interactive analyzer, or submit your own file for analysis.