Malicious PDF — malware analysis report

Static analysis result for SHA-256 1816cdf7b9229963…

MALICIOUS

PDF

34.9 KB Created: 2020-10-03 15:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c21cc7b1fd52008e445658def7b287c SHA-1: 34295ea6750f8d20beb627c60b42c0ea1e6678f6 SHA-256: 1816cdf7b92299633e509fc76c88e2eeed7ba7bc3bf4ce34fa25c1189d468310
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a 'Pokemon fire red version guide book' and the malicious URL itself, suggesting a lure to entice users to click the link. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/strik?keyword=pokemon+fire+red+version+guide+book
    • http://xetel.frenetik.org/uploads/1/3/0/7/130739802/xalefamulujibedipi.pdf
    • http://xubupax.perksautospa.net/uploads/1/3/0/8/130873995/883b374.pdf
    • http://duwurisoz.ahealthypositive.com/uploads/1/3/1/4/131410952/vaxorabuvad-nadagazinazago-jilevuzij.pdf
    • http://files.watervillefederated.com/uploads/1/3/0/7/130739621/pefigexolip_bamemipage.pdf
    • http://lowapazes.boatinsurance.wales/uploads/1/3/1/4/131452839/poxukifekuv-tolomaketafuk-jamiwip.pdf
    • http://mevogi.ptcwyo.com/uploads/1/3/0/7/130776756/modixutek.pdf
    • https://site-1036848.mozfiles.com/files/1036848/lisomevebezebojun.pdf
    • https://site-1039895.mozfiles.com/files/1039895/sozanak.pdf
    • https://site-1037267.mozfiles.com/files/1037267/xizozepizorubujuginabasut.pdf
    • https://site-1036695.mozfiles.com/files/1036695/sokokivinuwinesobowepi.pdf
    • https://site-1041785.mozfiles.com/files/1041785/98759546753.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b88.bin
54c7788805fabfbdcac3c718d9dd921b89704b9de91224323d419eeb041d71b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B88 5248 bytes
font_01_sfnt_off00005d60.bin
2d15b27f8d57fa870b2f3d146d83b8c47bddb7a179da164d13d138ce5609156c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D60 9764 bytes

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