Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f74317af2de757…

MALICIOUS

PDF

90.7 KB Created: 2021-07-01 18:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0165ee91b068432f1f241ba03586bd9a SHA-1: 7e67789fd7ef90b981cbd53ab61955d4374026ac SHA-256: d7f74317af2de757370f94c1075d7708ce4529833fef0b29f6fc747892c42a1d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous URLs hosted on compromised WordPress sites and disposable domains, suggesting an attempt to distribute malicious content or conduct phishing. While no scripts were directly extracted, the PDF structure and URL patterns are indicative of a malicious lure designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608153e2bd0dd---soraloxubigomomolatavu.pdf In PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/pebexomixit.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/lavezapegesefusamumog.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750a5a6a087---xekuwipedivo.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/ghr7ochj9nnckiu3ak406u9d2h/9967908550.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/ronopowul.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/60406826205.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/hbt0cjflsta6jv4hk5sru86ig5/75936367626.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/dcb8d3125a004e2c4068cdcbc7173186/bovozukupaxidiguvu.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/vorudox.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/3h9mjl2rc0u7oulakf5c817mj7/nozomakufosajenip.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/77a63aa09dd4abe34264a747f4b6f207/98758605451.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/8912684094.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/mofepefek.pdfIn PDF document text
    • http://thongthien.vn/upload/files/fubewuvokawobakotoxezejid.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/4224f431f2b339c9cd429dae54ce1447/76060548260.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/gaker.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160962f10a193f---87139284370.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/sepinekukotanebidojini.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/fomidaxi.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/vazimadisisetavisezi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+fall+series+2+episode+6PDF 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_off0000fe43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE43 17524 bytes
SHA-256: 6d5a88856de0aa18c894f1ca05ccf5331d622f588d1ced6da582e34dab767075
font_01_sfnt_off00012b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8D 10644 bytes
SHA-256: 2af635dc065fd4ffb42b209e88ae234f67bfcc7924b4cd3c654a1bb3bc1b87f6
font_02_sfnt_off0001440e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1440E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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