Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44bd37fa85907b5…

MALICIOUS

PDF

32.2 KB Created: 2018-06-11 08:24:40 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: 3c934a73324fbbd9d9af1e46c43421f1 SHA-1: 2d35ff434b6465f6a1b16f1f1cb166d5011120fe SHA-256: e44bd37fa85907b532bfac0301b9f576d49482fcafcfbffe30530d78b07b647b
102 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a fake download lure, specifically designed to trick users into downloading a file by mimicking search results for guitar chords. The embedded URLs, such as http://uncpbisdegree.com/download3.php?q=trevor-hodge-no-other-name-guitar-chords.pdf, are likely used to host or redirect to the malicious payload. No scripts were extracted, but the overall pattern suggests a phishing attempt to deliver malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9202

Heuristics 4

  • Fake 'free download' SEO-poisoning PDF critical PDF_SEO_FAKE_DOWNLOAD
    The ML classifier flagged this PDF AND it carries a visual download/call-to-action lure AND an off-domain server-side download-gateway link whose query string names a document payload. This three-signal conjunction is the fake-document / 'free PDF download' SEO-poisoning delivery pattern: the page is padded with benign decoy links to dilute classifier scores while funnelling the victim through the gateway to malware/scareware. Acting only on the conjunction keeps benign download-bearing PDFs from being misflagged.
  • 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
  • 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://uncpbisdegree.com/download3.php?q=trevor-hodge-no-other-name-guitar-chords.pdf
    • http://uncpbisdegree.com/download4.php?q=trevor-hodge-no-other-name-guitar-chords.pdf
    • http://www.bondegezou.co.uk/wngd.htm
    • http://www.gepr.net/ar.html
    • https://worshipdeeper.com/126/best-new-fast-praise-worship-songs/
    • http://doowopshoobop.com/vartitle1.html
    • http://www.forposterityssake.ca/Navy/RCN-OBITS-SECTION-48.htm
    • http://www.ideadiez.com/
    • http://unifeob.edu.br/miniblog/henry-steiner-cabins-masters-thesis
    • http://riverside-resort.net/1/the-ten-thousand-portal-wars-ii.pdf
    • http://riverside-resort.net/1/the-christian-world-modern-library-chronicles.pdf
    • http://riverside-resort.net/1/studies-in-auditory-and-visual-space-perception.pdf
    • http://riverside-resort.net/1/sony-icf-c318-user-manual.pdf
    • http://riverside-resort.net/1/teejay-publishers-level-d-homework-answers.pdf
    • http://riverside-resort.net/1/the-grand-comic-book-database.pdf
    • http://riverside-resort.net/1/sunburst-software-solutions-inc-releases-federal-wh-347.pdf
    • http://riverside-resort.net/1/two-rings-a-story-of-love-and-war.pdf
    • http://riverside-resort.net/1/sony-ericsson-z550i-cell-phones-owners-manual.pdf
    • http://riverside-resort.net/1/the-awesome-egyptians-horrible-histories.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tvtropes.org/pmwiki/pmwiki.php/Series/QI
    • https://en.wikiquote.org/wiki/Elvis_Presley
    • https://en.wikipedia.org/wiki/List_of_songs_about_Los_Angeles
    • https://y.qq.com/
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=ZH-CHS_EN&a=https%3a%2f%2fy.qq.com%2f
    • http://www.dictionary.com/e/s/word-of-the-year-list/
    • http://www.loot.co.za/index/html/index4234.html
    • http://www.loot.co.za/index/html/index4982.html
    • http://go.microsoft.com/fwlink/?LinkId=521839&CLCID=0409
    • http://go.microsoft.com/fwlink/?LinkID=246338&CLCID=0409
    • https://go.microsoft.com/fwlink/?linkid=868922
    • http://go.microsoft.com/fwlink/?LinkID=286759&CLCID=409
    • http://go.microsoft.com/fwlink/?LinkID=617297
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004280.bin
41c5b2a9bcbf574828296c9d6fc576e9bb9aee220ab14b64474dda42fbe893dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4280 10472 bytes
font_01_sfnt_off000063d1.bin
0883e31594f033b7866d9ffada95107a039145959feb286215d6ff28a565636d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D1 7080 bytes

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