Malicious PDF — malware analysis report

Static analysis result for SHA-256 8848a749f502c7fb…

MALICIOUS

PDF

83.8 KB Created: 2021-07-21 01:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 932dbf17363278f9d9648f69257fae4d SHA-1: 10fdf0907b40b7b4b10db7bcb5d58ec5325dd6fa SHA-256: 8848a749f502c7fb267b15264648444e0f5366bf592e4aca4f52cbd0bc0b6021
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links, many pointing to unknown PDFs hosted on compromised WordPress sites, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c233d1584ad---nebofudaledum.pdf In PDF document text
    • https://folklorebridge.eu/uploads/pictures/files/morumebopezitawuv.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a843eb18442---badowewuzopekasigot.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/4dd0eb4ccd98da179c2d08e5791ebf60/6972100035.pdfIn PDF document text
    • http://hookmyweddingup.net/clients/73542/File/15791806499.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/09596e3542ac37b94efbee33f4b5e727/najewi.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/667259261d1aec99a85e3700a96ef7e0/37894847436.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/638g5r7960bpnusa3td7i7s4bb/nolefowabeki.pdfIn PDF document text
    • https://drsaman.com/files/99155919737.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/0pvkqrpht8jnvfa0tkf4e1d8pc/98635717462.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/84249831737.pdfIn PDF document text
    • http://stpatricksreunion.com/clients/84553/File/lepugaradilowevipuvo.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/beseka.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/3066db56acbbab73a76eedf07bc61f40/pujisozasuta.pdfIn PDF document text
    • http://teerosy.com/ipp/images/uploads/files/tixedupaw.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/zupamevajoten.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/vuzuforerakikadofe.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608e66467fc03---2508281494.pdfIn PDF document text
    • http://pbsdeltarho50events.org/clients/d/dc/dc3fcb918f61c9276c5829b035df2abc/File/87636284497.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/zagejotik.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/67863011101.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/jomezuxixerisotuwe.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/sezivizimanefelukaxivupar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=two+types+of+asexual+reproductionPDF 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_off0000e40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40D 16980 bytes
SHA-256: 5d6d0abfc85f257f6ca5c09e293556fb2d5327baaeb70ff027fbe16a7c8f7296
font_01_sfnt_off00011014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11014 10980 bytes
SHA-256: 92316fe84643249dd9909b464b6f1073fe3b4d9bebbe604cec2d2fd5dbbbfa1d
font_02_sfnt_off000129d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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