Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd14d3b89b842ff…

MALICIOUS

PDF

72.9 KB Created: 2021-09-25 08:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3f29c2f9b59e3cf37e6e32e80ba9629c SHA-1: e9904df691b1f700dc8b8290b2a2e4d1544faf53 SHA-256: dbd14d3b89b842ff8b35115993748896045298a6b6d19e512f797f0f9d913dc5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous URLs, many of which are hosted on compromised or disposable domains, suggesting an attempt to direct users to malicious content or downloads. The presence of 'utm_term=popcorn+time+2021+download' in one URL indicates a lure for potentially unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://olterus.net/contents/files/11561157036.pdf In PDF document text
    • http://foxgraphics.paulsfashion.in/files/wagenetanaletutevopinuj.pdfIn PDF document text
    • http://polaryachts.com/res/wysiwyg/file/mutakudisoxejenojewa.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/37847161081.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/83428621005.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f0378b871---10571632464.pdfIn PDF document text
    • http://alvitraders.com/files/sojoruwif.pdfIn PDF document text
    • http://abworder.com/uploads/files/wawawoginel.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/fakokubumifubolawepejodu.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/pelutedodataleduxe.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/35236434092.pdfIn PDF document text
    • http://test-immo.com/file/7994231969.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/62789341031.pdfIn PDF document text
    • http://webs.eusko-ikaskuntza.org/files/galeria/files/13618668557.pdfIn PDF document text
    • https://hijaulumut.com/contents/files/durum.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/risudavapeseripis.pdfIn PDF document text
    • http://www.autoservis-hubatka.cz/admin/upload/ww/file/27275590747.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/9ec63c0e5cdb061d093e30a595a508e8/zavesetob.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/84161819001.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/79079261036.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16135f3b30aafb---sisaloxukoz.pdfIn PDF document text
    • http://hladonural.ru/upload_picture/56121480563.pdfIn PDF document text
    • http://myshiou.com/uploads/files/202109040548504136.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/15361915701.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=popcorn+time+2021+downloadPDF 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_off0000b6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6DF 17816 bytes
SHA-256: 98b2ee5060eeb5a5a8e512f26033567d9c856dfbe771a7662dca717dbe46989e
font_01_sfnt_off0000e45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC76 10888 bytes
SHA-256: e7aed1c6e235818ff3fcc5def53774f995f437a48616649cf526da01144841d4

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