Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e53b50d407b3052…

MALICIOUS

PDF

115.4 KB Created: 2020-03-29 12:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 640dbb6a95f1c5ad43f3b3bd0418c8d7 SHA-1: 8d8db3b82eeda0f7c0f5d648cc0067ef7420e719 SHA-256: 5e53b50d407b3052b026d27f1a0bda5764a79e21f294b35288c3058e6b84a592
104 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, employing a 'download button' heuristic and embedding multiple external links to compromised websites. The document body, though heavily obfuscated, contains a URL that appears to be a pretext for downloading a manual, likely a decoy for a malicious payload. The presence of numerous PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://74-123-77-80.mgwnet.com/uploads/1/3/0/7/130740110/130740110.html#hp+laserjet+1100+manual
    • http://thejcrawfordagency.com/uploads/1/3/0/6/130620756/1f1eb120e1d0b81.pdf
    • http://leacom-usa.net/uploads/1/3/0/6/130639491/dugoxa.pdf
    • http://dentalsmilesunlimited.net/uploads/1/3/0/6/130604233/8514735.pdf
    • http://ta-walters.com/uploads/1/3/1/1/131163763/6f8e704c9ffc1.pdf
    • http://classatravel.com/uploads/1/3/0/5/130590195/226924.pdf
    • http://stefano-ward8.com/uploads/1/3/0/3/130323092/nazefo.pdf
    • http://scalliewag.com/uploads/1/3/0/3/130379458/belobuwol_rekuwupeladobo_fabunobi.pdf
    • http://thefitchica.com/uploads/1/3/0/5/130590665/zozobogipepa.pdf
    • http://citywidepainting.ca/uploads/1/3/0/4/130435509/2b888552f.pdf
    • http://wordbearer.org/uploads/1/3/0/7/130739190/5196796.pdf
    • http://thekitchenct.com/uploads/1/3/0/9/130969840/c8d61c88ef.pdf
    • http://insideoutalive.com/uploads/1/3/0/5/130552034/2408413.pdf
    • http://coffeewithonions.com/uploads/1/3/0/2/130289332/kebun_zasijo_pipebojaju_kazimeba.pdf
    • http://jpaccountant.com/uploads/1/3/1/1/131163658/kitugajiwil.pdf
    • http://pbeisenstein.com/uploads/1/3/0/6/130604982/doturubazejudaw.pdf
    • http://heatherlaskyphotography.com/uploads/1/3/0/2/130271102/makulesaniketejidisi.pdf
    • http://sginvestmentproperties.com/uploads/1/3/0/7/130776316/1646281.pdf
    • http://homespacecorp.com/uploads/1/3/0/2/130287898/gujob.pdf
    • http://montaukptandwellness.com/uploads/1/3/0/3/130379841/jozipavosimetuxewas.pdf
    • http://flairdenver.shop/uploads/1/3/0/5/130589072/5dd8ab4a06.pdf
    • http://gaiapendragon.com/uploads/1/3/1/4/131413222/zapizejuzodixasigo.pdf
    • http://oakdalemma.org/uploads/1/3/0/2/130289595/1628494.pdf
    • http://andrewandhanna.com/uploads/1/3/0/6/130603866/26f5e8d.pdf
    • http://actyc.co/uploads/1/3/0/5/130547207/812edb5f6ea.pdf
    • http://refugefriendsinc.org/uploads/1/3/0/8/130874391/vikubebeku_moxomisisuvasok_fumitewelel.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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018f1b.bin
0e68571cd03aa0b2f7432fa678f63dd1a46de317739109c6fd22783ff74b2a3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18F1B 10904 bytes
font_01_sfnt_off0001b4ff.bin
bb66d78edca8aa75a8db461931e44ad6eab12e4cd439df836d92d13c6ef6c22d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4FF 2668 bytes

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