Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b20b1777a8127e8…

MALICIOUS

PDF

49.3 KB Created: 2020-06-08 06:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e68608b06b71c1ea7288fb64c0d5a81 SHA-1: 8dd540e946213b174f2a2e817364a77cd1e57a7d SHA-256: 1b20b1777a8127e85a4b206bef2d77dfdac3f6e6152699e144e7e482e86ccd81
94 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with a significant number pointing to domains that appear to be part of a link farm designed for SEO manipulation. The document body, though partially garbled, includes a URL that is also present in the heuristics, suggesting a deliberate attempt to redirect users to malicious content. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://sixty29.pleasingfood.com/uploads/1/3/0/4/130483512/130483512.html#c%25C3%25A1ch+%25C4%2591%25E1%25BB%258Bnh+d%25E1%25BA%25A1ng+ph%25E1%25BA%25A7n+tr%25C4%2583m+trong+mail
    • http://plazaltd.co.uk/uploads/1/3/1/8/131871699/guwimuxuwu.pdf
    • http://2py.undesirable.us/uploads/1/3/0/8/130873945/6107617.pdf
    • http://chefbypassion.co/uploads/1/3/0/2/130291030/711e2d22447d888.pdf
    • http://bergaktiv.net/uploads/1/3/0/3/130313428/piwiregapokovekew.pdf
    • http://hostmaster.rachelsawyer.co.uk/uploads/1/3/0/6/130620490/wimimidekix.pdf
    • https://wukuxolofis.files.wordpress.com/2020/06/84605740380.pdf
    • https://fakovok.files.wordpress.com/2020/06/61438048117.pdf
    • https://wedidudobeve.files.wordpress.com/2020/06/jezasesafopibe.pdf
    • https://joxoxaben.files.wordpress.com/2020/06/vavekipibasologoko.pdf
    • https://detixuge.files.wordpress.com/2020/06/jazilotamamifizizugibojad.pdf
    • https://vajowobago.files.wordpress.com/2020/06/63739825592.pdf
    • https://zofefovobize.files.wordpress.com/2020/06/83214269185.pdf
    • https://xupunugoj.files.wordpress.com/2020/06/jofezekufedo.pdf
    • https://miwajanawal.files.wordpress.com/2020/06/lixatifudasekuw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008076.bin
8c3ead193199853418796b539103e93cbbe2ae78afaae867eb430183fb08c0a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8076 24652 bytes

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