Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd0c27dbb04a91d2…

MALICIOUS

PDF

34.1 KB Created: 2018-06-11 08:54:48 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 15a568d536efeb475a010507170f9c94 SHA-1: e2db731f9c8691efbdd9af187eeb0745a2826542 SHA-256: cd0c27dbb04a91d2bc10ff21c3ca22b5a51208dd5d702476f87befe25eed630b
130 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs and a fake 'free download' lure, indicative of SEO poisoning. The primary malicious gateway identified is http://uncpbisdegree.com/download3.php?q=wake-up-to-your-life.pdf, which is likely used to distribute a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9395

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.
  • PDF carries a PHP-gateway SEO-spam PDF link farm medium PDF_SEO_PHP_GATEWAY_LINK_FARM
    PDF contains four or more clickable links whose target is a `.php` gateway with a multi-word search-PHRASE document slug embedded after it (e.g. 'index.php?.../binary+options+trading+nz.pdf' or 'pdf.php/cialis-dosage-side-effects.pdf'). Legitimate PHP-served documents use a filename or numeric id, not a search-query phrase, so this is the generated SEO link-farm shape — pharma / binary-options / 'free download' spam that ranks for queries and routes users into payload/redirect chains. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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=wake-up-to-your-life.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=wake-up-to-your-life.pdfIn PDF document text
    • http://www.wakeupkiwi.com/news-articles-54.shtmlIn PDF document text
    • https://www.wakeupnfuck.com/In PDF document text
    • http://jazzupyourlifewithjudy.com/summit/replay/In PDF document text
    • http://wakegov.org/In PDF document text
    • http://www.wakeupkiwi.com/news-articles-29.shtmlIn PDF document text
    • http://tooxclusive.com/download-mp3/m-abaga-rappers-fix-lives-new-song/In PDF document text
    • http://slumberwise.com/science/your-ancestors-didnt-sleep-like-you/In PDF document text
    • http://pogues.com/In PDF document text
    • http://wfpanc.com/In PDF document text
    • http://www.soulprogress.com/html/ArticlesFolder/Articles/RealReason.shtmlIn PDF document text
    • http://capstonereport.com/2018/04/06/wake-wokeness-j-d-greear-embraces-racialism-rhetoric-white-privilege/31966/In PDF document text
    • http://www.kolbe.com/In PDF document text
    • http://www.texarkanagazette.com/In PDF document text
    • http://riverside-resort.net/1/vocabulary-workshop-enriched-edition-level-e.pdfIn PDF document text
    • http://riverside-resort.net/1/vogue-the-gown.pdfIn PDF document text
    • http://riverside-resort.net/1/written-out-the-kavanagh-and-salt-series.pdfIn PDF document text
    • http://riverside-resort.net/1/when-was-christopher-columbus-born.pdfIn PDF document text
    • http://uncpbisdegree.com/1/study-guide-compares-to-program-technician.pdfIn PDF document text
    • http://uncpbisdegree.com/1/statics-13th-si.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-a319-a320-system-guide.pdfIn PDF document text
    • http://uncpbisdegree.com/1/solution-manual-for-fundamentals-of-advanced-accounting.pdfIn PDF document text
    • http://riverside-resort.net/1/vocabulary-workshop-unit-10-synonyms-antonyms-answers.pdfIn PDF document text
    • http://uncpbisdegree.com/1/sql-server-advanced-interview-questions-and-answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://www.amazon.com/Philips-Sunrise-Therapy-HF3650-60/dp/B075S53HD9In PDF document text
    • http://seattlemamadoc.seattlechildrens.org/toddler-sleep-4-reasons-toddlers-wake-up-at-night/In PDF document text
    • https://www.youtube.com/watch?v=3YxaaGgTQYMIn PDF document text
    • https://www.nytimes.com/2017/05/25/world/canada/euthanasia-bill-john-shields-death.htmlIn PDF document text
    • http://www.wakehealth.edu/In PDF document text
    • https://en.wikipedia.org/wiki/SleepIn PDF document text
    • https://www.nia.nih.gov/health/good-nights-sleepIn PDF document text
    • https://www.nia.nih.gov/healthIn PDF document text
    • http://www.oprah.com/app/the-oprah-winfrey-show.html#In PDF document text
    • http://www.oprah.com/index.htmlIn PDF document text
    • https://www.apple.com/support/exchange_repair/In PDF document text
    • http://www.latimes.com/business/In PDF document text
    • https://www.cnbc.com/technology/In PDF document text
    • http://go.microsoft.com/fwlink/?LinkId=521839&CLCID=0409In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=246338&CLCID=0409In PDF document text
    • https://go.microsoft.com/fwlink/?linkid=868922In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=286759&CLCID=409In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=617297In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A4A 10428 bytes
SHA-256: 2dfe6bc6a209cf95b82a4f3d4e685e004a6c186fc3523cc9318a5f3d91a81a4a
font_01_sfnt_off00006b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B49 6696 bytes
SHA-256: b3b25c35a8190c1f72b729f919f634662094fdb37401d6478280a247c5b0ee3f