Malicious PDF — malware analysis report

Static analysis result for SHA-256 33fd34b0347da1ee…

MALICIOUS

PDF

80.9 KB Created: 2021-09-11 02:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 79a385c451fe6cb413f13815f0c2f35a SHA-1: 702ea86da60a415c830f0145c96e7015d70b81a9 SHA-256: 33fd34b0347da1eefab06251743bd42333a76b0386c323525cff45c7a68fd9c1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains and are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via SEO poisoning. The embedded JavaScript is a common technique for executing malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/k7jtrldrvtgidvm5lvq00r86hr/38130574882.pdf In PDF document text
    • http://traslochimontalto.it/userfiles/files/31976654219.pdfIn PDF document text
    • http://iuoooo.com/filespath/files/20210905175708.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/3052086210.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///22221104350.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/33227614161.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/sajanoxuk.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/kasowowevam.pdfIn PDF document text
    • http://logicamail.it/draft/media/jesojinimoxab.pdfIn PDF document text
    • http://ebus.cn/up_file/file/muniw.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/modawinoxovalukiti.pdfIn PDF document text
    • http://bookblog.kr/data/file/files/40768911811.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/89129700063.pdfIn PDF document text
    • http://lpsa.cz/userfiles/file/kamuvixasanoforudesosu.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/86212549738.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/fotevononafagerulopu.pdfIn PDF document text
    • http://mobilahomedesign.com/userfiles/files/34916949030.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/60948992232.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/timisusezi.pdfIn PDF document text
    • https://duvanco.be/docs/files/feronabafozoditat.pdfIn PDF document text
    • http://aquaclub.hu/userfiles/file/kiwimovofezalidazilak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=power+of+subconscious+mind+pdf+freePDF 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_off0000d7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CD 10800 bytes
SHA-256: cd0ada584e9e8c04d8ed44479408d4f8b2dec53bc30fe0116f911838a1590fbf
font_01_sfnt_off0000f08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 17720 bytes
SHA-256: e99edf831ff0145de149e4c6b2500392b357d19970a8e14baf4db918e394e794
font_02_sfnt_off00011de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.