Malicious PDF — malware analysis report

Static analysis result for SHA-256 672909fa26eba2fb…

MALICIOUS

PDF

95.6 KB Created: 2021-09-10 15:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: cbafc918d7a4a05920fecc3574debc53 SHA-1: edeb6c9b4a84c3728e983e87b283610a3b766cc6 SHA-256: 672909fa26eba2fbfd283ab3e19598a83a8cdce432ce4efaf038cf0a7be83b83
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one that appears to be a lure for a game download. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing or malware payload. The presence of numerous links on disposable hosting further supports a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://crysiq.ru/uplcv?utm_term=gta+san+andreas+remastered+pc+2017+edition+v5+download PDF link annotation
    • http://aucoindeshalles.fr/menu/file/bisaloz.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/2537747704.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/koralamigilepem.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/61100975885.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/68907033198.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/39447886104.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/tolopaxexoli.pdfIn PDF document text
    • http://195exim.com/datas/files/kesisanememavi.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109041557234252.pdfIn PDF document text
    • http://irs-messtechnik.at/upload/79103010135.pdfIn PDF document text
    • http://www.mananthavadynorbertines.org/www/js/ckfinder/userfiles/files/waropufusibidemo.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/69153422275.pdfIn PDF document text
    • http://kukubara.com/zdjecia/file/24561263978.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/21457040200.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/30195086397.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/20213928194.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83915370100.pdfIn PDF document text
    • https://eletmodguru.hu/files/files/57708751352.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/60565877032.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/fomenukamuzixopebijijeli.pdfIn PDF document text
    • https://mchs.kz/userfiles/File/23821034920.pdfIn PDF document text
    • 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_off00010fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA9 17472 bytes
SHA-256: 09dd3a57fa631142f0aef9d2d2d6dfb51211ea050c74c0b83e1b8841a5d92dbd
font_01_sfnt_off00013d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3F 11344 bytes
SHA-256: b4a06022ba8edf55941a8710494898574b5aeed04ba26227008f98dc6bb513b3
font_02_sfnt_off00015829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15829 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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