Malicious PDF — malware analysis report

Static analysis result for SHA-256 96aab5e702b8c85e…

MALICIOUS

PDF

90.6 KB Created: 2021-07-02 11:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 133c10d59d367baa2db728005002ec9f SHA-1: e25663e50a426c38fa4390fc7f2a778054c3b121 SHA-256: 96aab5e702b8c85eb6b204f9115df0c17d9b1549d17c3957d787e22edb7dad2b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The presence of these links suggests the file is designed to lure users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://kvbm.org/pds/userfiles/files/5649086658.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/8bab3b169eba24d7a8766858d5a92116/12431735975.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/7fihfso64hipdeo7lusqq0f96j/fikojego.pdf
    • http://www.asslar.de/downloads/56724963996.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96d1ce4b67---mupafedugiwebexadojugufel.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885398e7771---61458068859.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/99259827330.pdf
    • http://www.allatpatikapecs.hu/images/file/1828317480.pdf
    • http://www.tobywells.org/media/fckdir/file/85239223708.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f36c52a8c4---nisojuwi.pdf
    • https://infiniteprospects.com/FCKeditor/file/12199236581.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083413a2913a---powixisepelugabufuvupuj.pdf
    • https://imotrading.com/images/userfiles/94969248902.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/4ec5g8fvf6d7bgasf4hgv0im5m/73220537707.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160debf7cda07b---14830389167.pdf
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/20111747018.pdf
    • http://tw-sincere.com/upfiles/editor/files/midepuxosol.pdf
    • http://bafiti.com/sklep/userfiles/file/kenakewiwekefazotux.pdf
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/govabikebezemeremet.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5d6d8cfbd---61319914800.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/4df60e6d994253a8480d88e9f9b8a92f/noxoxijilomubilumaluv.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/a86652b6355beb25c86ac22d4f957edc/36435913872.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb0a7070ee---82798622063.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c50210988ff---85753510118.pdf
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dijikasenim.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d01f21017---89447042198.pdf
    • https://room12shio4.com/contents//files/26930947247.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=algebra+1+practice+worksheets+with+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb7f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7F 16792 bytes
font_01_sfnt_off00011391.bin
47b2b505452efbecad198997529973851725754a595da4e4627bfee18d1dd50b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11391 18156 bytes
font_02_sfnt_off0001433d.bin
a8a2cc5755c78ae9cbdbc3d6d20141366721a451517ccd864fb24fce232a0522
pdf-font-stream PDF embedded font (sfnt) at offset 0x1433D 11004 bytes