Malicious PDF — malware analysis report

Static analysis result for SHA-256 0010e5ab88f17dd3…

MALICIOUS

PDF

84.4 KB Created: 2021-10-07 02:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 459cf5d269ea3db4452e205c7307c075 SHA-1: a1bd06a4740ed1196b4125eb98936d623685cb57 SHA-256: 0010e5ab88f17dd3b4abca018241bad7bfee6d478eeb6e31b05411e4c7506ff2
74 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 PDF files hosted on disposable domains, indicating a link farm for malware distribution. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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://food-cloud.com/home/food-cloud/www/site/site/data/files/36472939909.pdf In PDF document text
    • http://sicompk.com/survey/userfiles/files/xemevefegorovisatakiso.pdfIn PDF document text
    • http://geraldinekilkelly.ie/37914693500.pdfIn PDF document text
    • https://ladangmimpi.com/contents/files/32155099965.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/94536163782.pdfIn PDF document text
    • http://iviltra.lt/images/files/39516724120.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202109101321421865.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210928165402.pdfIn PDF document text
    • http://luyutea.net/v15/Upload/file/2021104950462829.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/13758888649.pdfIn PDF document text
    • http://gok-maciejowice.pl/js/ckfinder/userfiles/files/83650562124.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/24336549909.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/42049503362.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210911201956.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/ad89d3888a93cd53d8a316a1bd88585f/zotojilepinililijam.pdfIn PDF document text
    • https://knoxvilleremembers.com/media/supojijivubed.pdfIn PDF document text
    • http://michelschuurmans.nl/images/uploads/file/11602935578.pdfIn PDF document text
    • http://trovas.com/userimages/186254188.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16152640600d35---sebowofenanubofa.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/79316165521.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/23446518151.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/9341492123.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/7668517974.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/kojodoxufitowu.pdfIn PDF document text
    • http://przyrodnik-kujawy.eu/userfiles/file/lerotexofa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=nba+2k20+apk+obb+download+for+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1D 22016 bytes
SHA-256: 5c55e4c1f7264c8777c1e97eee3478a5ff39984446e54865f38d79ec37bc68ba
font_01_sfnt_off00011364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11364 10628 bytes
SHA-256: ad6e61df087dcaf9c93f41f38b46b114b55fbb25a583084ae43848ea0fccba5f
font_02_sfnt_off00012ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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