Malicious PDF — malware analysis report

Static analysis result for SHA-256 94be33dab2e7ae3f…

MALICIOUS

PDF

83.9 KB Created: 2021-06-26 22:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5bca4cfa7ac68644b5cc6a1d814de589 SHA-1: 6ee38016d9f395cda444d32f35f3e0e1f6e4e725 SHA-256: 94be33dab2e7ae3fb03a9dfcf059d194c01f1e2d9c6c6e2ad92aef14ba46103b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs that form a link farm, pointing to compromised CMS upload storage and disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://inwebjor.ru/uplcv?utm_term=picea+pungens+thume
    • http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/43158358009.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/03a11c230ba9d437bc766ada345f1572/sojelogego.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079c391883f4---92697134342.pdf
    • https://ijpdua.com/contents//files/pitifesujepapefevi.pdf
    • https://standardpromotion.com/images/upload/userfiles/files/7922205805.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/5888c2393858eee91eb87dfd939b85d0/zimanonufutak.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/b2f62d5a6bc528233b8741ef874e0ceb/tijamokuzomomo.pdf
    • https://ohcsi.com/ckfinder/userfiles/files/xuzivezanalokawokefonudow.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/bbfc4d33c5c4fe5097e957c9d3babdf7/xewisije.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef46a27ed9---33196272731.pdf
    • http://garderoba.sk/images/_file/71676454203.pdf
    • http://precedent.by/_newsite/images_from_html_editor/file/kifoxunikozekupexawu.pdf
    • https://atcotourismtravel.com/userfiles/file/foduwoduzid.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/s0hmaa90epjsjd906m21pvl4o8/65409019090.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/u6dj96pvs9hiu4gar3uq7lreod/76851918975.pdf
    • http://shipagents.nl/uploadfiles/file/fotupipuvovesudow.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a09a5320531---genobum.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/beb4b37c2f82afffc67bdcdf7f2c8142/kaxijokaxoxiwujodexobo.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/5ae750485ab04ed1dd6569b8e9236111/tudeta.pdf
    • https://angkoronetour.com/userfiles/file/vibube.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/fdbaf0997cdb0ade0d9018ed156af2fb/96722529664.pdf
    • 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_off0000e20d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE20D 16792 bytes
font_01_sfnt_off0000fa24.bin
da1491d6784e655c175e66bc4cf740b9905fe6b61081f32ff664353d2beded4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA24 10656 bytes
font_02_sfnt_off0001125b.bin
f231989e14a6c858031084fdcf479efec1b2a36ec7f01a5f24c0607fabdef873
pdf-font-stream PDF embedded font (sfnt) at offset 0x1125B 18988 bytes