Malicious PDF — malware analysis report

Static analysis result for SHA-256 7204a71dd095852c…

MALICIOUS

PDF

94.9 KB Created: 2021-09-19 11:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: f4a0a2d52dbee5298c1f859fe5b47338 SHA-1: 71b4ffabc7a941f35cde200122976a99b9d53daa SHA-256: 7204a71dd095852c022ef1a4012c8e1d2d2c8e5a980aeb3da8bf62d4e06ba91c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites. The presence of numerous external URIs, many pointing to potentially disposable domains, strongly suggests a phishing or malware distribution campaign. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

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://rracc.com/file_media/file_image/file/katokaguwa.pdf In PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/11921808802.pdfIn PDF document text
    • http://yourhandmadeitems.com/userfiles/file/92157092689.pdfIn PDF document text
    • http://patanjali.zohukum.com/ckfinder/userfiles/files/sodubeluwiri.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/68343533569.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210913081519.pdfIn PDF document text
    • https://luminex.pl/upload/file/92200535908.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/kugoxevatofosovinide.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16145d5a4642a9---zatuvudusu.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/96722010552.pdfIn PDF document text
    • http://gibisch.info/files/files/mujijagadusidovapifanabu.pdfIn PDF document text
    • http://faradbox.pl/files/file/faxokat.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/fuforuv.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/74933449016.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/1693365339.pdfIn PDF document text
    • http://zoo-foto.cz/userfiles/file/6087406576.pdfIn PDF document text
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/nibifamurug.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/54696489657.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/68701482897.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/84823176265.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/xisevonawanuxu.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/32408403919.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=telltale+games+android+free+downloadPDF 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_off00010ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED3 17900 bytes
SHA-256: bf55af28de473c0330ac6f3714ad98a4db4844477c958d4d48ff27858db32169
font_01_sfnt_off00013d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001556e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1556E 10744 bytes
SHA-256: e29026c0a1faf8545b4fc36d1abc3936021250faf765fd4d22c5790cb2b213ce

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