Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8118a56dc2800ae…

MALICIOUS

PDF

38.4 KB Created: 2020-04-01 12:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f7e99005e09b7232c50c22d8004f17cd SHA-1: 26fc8ab4ef5d8960f99dd840fe6ad06a01d7751c SHA-256: e8118a56dc2800ae1ad87dadd02db6e07a908103f4baec4f566f202a66a8d4d3
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, appears to contain some of these URLs, suggesting a link farm or SEO poisoning attack. The primary goal seems to be directing users to a network of potentially malicious websites.

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://ezondowntheroadbikes.com/uploads/1/3/0/4/130475980/130475980.html#se%C3%B1ales+de+transito+colombia+ppt
    • http://myfampow.com/uploads/1/3/0/4/130493893/41272.pdf
    • http://mypccabenefits.com/uploads/1/3/0/6/130604517/fesitoz-putok.pdf
    • http://mugsman.com/uploads/1/3/0/9/130968973/sadepuvex_kagigo_pokax.pdf
    • http://mythebestsully.org/uploads/1/3/0/7/130739664/1824336.pdf
    • http://devotionswithdennis.com/uploads/1/3/0/8/130874231/lowabadume.pdf
    • http://midwesttravelbuddyonline.com/uploads/1/3/0/6/130604758/gipiliremejimi_gofusepojaro_kiridebabekek_redumara.pdf
    • http://klaycentric.ca/uploads/1/3/0/6/130605416/fexisado.pdf
    • http://foodbanknca.us/uploads/1/3/0/8/130874606/jujobepijoxizuxe.pdf
    • http://oscarnet.biz/uploads/1/3/0/9/130969813/xitevekikot-vusetitugetaka.pdf
    • http://bartoncreekhousepainting.com/uploads/1/3/0/6/130620313/xonaxo.pdf
    • http://dundeehills.ca/uploads/1/3/0/2/130289386/2862371.pdf
    • http://kennaraes.com/uploads/1/3/0/7/130776174/7fa14.pdf
    • http://alphachiomegaofoaklandcounty.org/uploads/1/3/1/3/131397997/3515343.pdf
    • http://wisdomphilosophy.com/uploads/1/3/0/5/130588279/xerekebodajudazi.pdf
    • http://soultosoullifecoach.com/uploads/1/3/0/5/130588936/tezexapa_puzufi_luvusiwa_kotuxiwo.pdf
    • http://tutorwiseatlanta.org/uploads/1/3/0/5/130540401/cb65f7.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_off00006a77.bin
b439c264054ee384dfd7ef0fe1c974520d945365f7da8ccf81ceb31c1924ebdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A77 8928 bytes

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