Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e6f906fcdcf29c…

MALICIOUS

PDF

78.6 KB Created: 2021-09-03 17:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ab71aef0c96c7776c84758cdbd9e65d3 SHA-1: ce8edff352148aa44d187ba1a3910a930475cdd0 SHA-256: 96e6f906fcdcf29c7489671b5a13b8daeb8d7c7ca99f2a776ffb9244e4a121dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://stcc-sa.com/motakamel/Ups/files/19887001994.pdf In PDF document text
    • http://firmen-bekleidung.at/userfiles/file/kupudigunije.pdfIn PDF document text
    • http://evola.it/userfiles/files/85983699833.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a54304b3692---dinigunajazikepuluxa.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ai7m6599s971uhcfdpjgasdc49/53521135930.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/72d059d53f29cb06b990c3e43d64fb73/gosiwesusumevemedawi.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/93938315653.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/cd3bb4086a5938c9b730c43e3fbe9f02/98812357401.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/josij.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/gl17c3d9mogivl1ac3ibjspv5m/wabajirojuwexerimokan.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/52449837558.pdfIn PDF document text
    • https://kristinanamaste.eu/files/mifuzuw.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c02fa9e1cd9---69936395911.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/jofatadub.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/fejosadigurob.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210526211430.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160768c48453da---vamevominuworedegonutosux.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160933f7f7827c---80317111912.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/tibofawer.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/un4st91gbhktkggsttqoa8sfof/48441149552.pdfIn PDF document text
    • http://korytnica.net/data/files/60673663517.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/11d02b23ca51bcffd80089bbd9594a88/jeluvukiwininedilivenalo.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bd17995272c---janimiwepixuvogonizovero.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/87849380801.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=glacier+bay+toilet+installation+manualPDF 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_off0000cfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBA 17112 bytes
SHA-256: 164ed04e92b2c5cc2c4cf8f4ee0397526dadcf4906dfa111cd6388d0063beed0
font_01_sfnt_off0000fc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11428 10784 bytes
SHA-256: fd0068fddbccadd86b07df3341c072f428353d7db094305c94962ab683fcba2e