Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e395c31a47b6f4c…

MALICIOUS

PDF

72.0 KB Created: 2021-09-11 03:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 594db1e0f691850f1442d94697bfc4ea SHA-1: e3439255e3b978c80108786008b0c3848e62a93e SHA-256: 1e395c31a47b6f4c1adb9397e3564109328296c3e48f70bddcb2acabd2da0d42
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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.
  • 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.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/19657411258.pdf In PDF document text
    • http://ymmicro.com/files/files/10345993019.pdfIn PDF document text
    • https://itscebu.com/upload/file/20210902011404.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/56559319234.pdfIn PDF document text
    • https://cytokin.ca/upload/editor/file/rebarava.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/zizoxomogoguruxutite.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/duwunipu.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/92661134291.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/61463163573.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/54971261855.pdfIn PDF document text
    • http://mclarenquartz.in/ci/userfiles/files/2967728834.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/94596048233.pdfIn PDF document text
    • https://cosonnguyenthanh.vn/webroot/userfiles/files/zuzogobafixefudawidagafi.pdfIn PDF document text
    • https://iohrp.org/f_files/files/91018058133.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/10807322400.pdfIn PDF document text
    • http://bakoca.hu/files/file/90533501082.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/kijufoduletokokegokuzifo.pdfIn PDF document text
    • http://iberryhomemade.com/userfiles/files/lidoremaviketixeguximabub.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/tifewajesobowame.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/26312601549.pdfIn PDF document text
    • http://onlinevay.com/upload/files/68642701439.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/xegurikitasoperulu.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mirorogakexotigu.pdfIn PDF document text
    • http://wych123.com/upload/files/kurobog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=exportar+sms+androidPDF 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_off0000b87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB87A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD091 10460 bytes
SHA-256: 726f69d57accb4ca1a687848312094efd425f2960e228207690179540eec8a3e
font_02_sfnt_off0000e83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83E 16532 bytes
SHA-256: 678ca653d254fcd50e1ad8a34491988515bb4182a08db7497b0e27b28b3c0880

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