Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d640444e691c270…

MALICIOUS

PDF

82.7 KB Created: 2021-09-07 09:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 09845490b4f89e9b13b7715a9519544b SHA-1: b3b42b4832d90ede997ace4aeb01ba909b9dd2da SHA-256: 7d640444e691c27063c022a1f75089d191c6d177e77aff83a6bfeb54e33ab23f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://glavis.biz/userfiles/file/32352437763.pdf In PDF document text
    • https://ventadeterrenosurbanos.com/userfiles/file/53084935123.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608bad738ab4c---nimaseralametudisup.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/judem.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/fazuzugokafovi.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/besabukafonabubowos.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/jewazosabovuwijapavobuv.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210628023250.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/27214998165.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/dibawewuxisa.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/82711886750.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/96402619516.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/gumuxefipexakejudumir.pdfIn PDF document text
    • http://zimmerei-possert.at/newosezugifa.pdfIn PDF document text
    • https://x-software.cz/data/file/64613528087.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/10531997790.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/salijejijatokizani.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/gerenarizoga.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/vorovoxeburegotuvizodup.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/gabogazeze.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/nepuku.pdfIn PDF document text
    • https://sakura-bashi.com/uploads//files/202108072210041542.pdfIn PDF document text
    • http://bige.vn/uploads/userfiles/file/18707339966.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=englisch+matura+textsorten+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD821 20136 bytes
SHA-256: 68335221e5c7e3db530284934db16164732908a3d117b55194f9d228d3143e8e
font_01_sfnt_off00010b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1F 11252 bytes
SHA-256: 61bf5d562c5136d6490cac71b8c40bceefb7e9fb951084f88e5e3536cdaff24c
font_02_sfnt_off00012523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12523 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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