Malicious PDF — malware analysis report

Static analysis result for SHA-256 568368a6354bd129…

MALICIOUS

PDF

36.3 KB Created: 2018-06-11 09:51:38 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 014fa6f3691240b92a38ced47cafb01d SHA-1: 38b55fe42b89960a47dee99a080f5163768478f2 SHA-256: 568368a6354bd12925873f171601a91eccdbcef3810ea911148103a577ef4e21
130 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains embedded URLs that point to a domain associated with malicious downloads. The ML classifier strongly flagged this PDF as malicious, and the presence of a visual download button further supports a deceptive lure. The document body, though partially garbled, includes references to the suspicious URLs, suggesting an attempt to trick the user into downloading a file.

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=smart-speaking-60-second-strategies-for-more-than-100-speaking-problems-and-fears.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=smart-speaking-60-second-strategies-for-more-than-100-speaking-problems-and-fears.pdfIn PDF document text
    • http://emfsafetynetwork.org/smart-meters/smart-meter-health-complaints/In PDF document text
    • http://howtoloseweightfastq.com/how.to.detox.pain.medicine/detox-smart-cleanse-dietary-supplement=sr4326/In PDF document text
    • http://www.texarkanagazette.com/In PDF document text
    • http://www.bilderberg.org/masons.htmIn PDF document text
    • http://www.bibme.org/In PDF document text
    • http://howtoloseweightfastq.com/burn-more-fat-workout-dont-eat/best.fat.burner.for.men.over.60=hf8506/In PDF document text
    • https://www.businessballs.com/glossaries-and-terminology/acronyms-finder-199/In PDF document text
    • https://www.businessballs.com/course/In PDF document text
    • https://www.businessballs.com/glossaries-and-terminology/In PDF document text
    • https://www.eventmanagerblog.com/event-technologyIn PDF document text
    • http://bemycareercoach.com/soft-skills/list-soft-skills.htmlIn PDF document text
    • http://www.overpopulation.org/India.htmlIn PDF document text
    • http://riverside-resort.net/1/service-manual-for-maytag-washer.pdfIn PDF document text
    • http://riverside-resort.net/1/ultimate-1001-songs-everybody-loves-to-sing.pdfIn PDF document text
    • http://riverside-resort.net/1/the-amazon-fire-phone-user-guide-beginner-to-expert-in-1-hour.pdfIn PDF document text
    • http://riverside-resort.net/1/the-bachman-books.pdfIn PDF document text
    • http://riverside-resort.net/1/too-many-bosses-too-few-leaders-the-art-of-being-a-true-leader.pdfIn PDF document text
    • http://riverside-resort.net/1/solutions-of-iit-jee-2012-by-fiitjee.pdfIn PDF document text
    • http://riverside-resort.net/1/the-nuclear-revolution-international-politics-before-and-after-hiroshima.pdfIn PDF document text
    • http://riverside-resort.net/1/the-world-after-9-11.pdfIn PDF document text
    • http://riverside-resort.net/1/study-guide-for-gravetter-wallnau-am.pdfIn PDF document text
    • http://riverside-resort.net/1/the-sacred-circle-tarot-deck-a-celtic-pagan-journey.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.msn.com/en-us/moneyIn PDF document text
    • https://www.informationweek.com/default.aspIn PDF document text
    • https://www.newscientist.com/lastword/In PDF document text
    • https://www.washingtontimes.com/communities/In PDF document text
    • https://abcnews.go.com/healthIn PDF document text
    • https://www.cnbc.com/wires/?redirect=1In PDF document text
    • https://en.wikipedia.org/wiki/Gun_politics_in_the_United_StatesIn PDF document text
    • http://slatestarcodex.com/2018/01/15/maybe-the-real-superintelligent-ai-is-extremely-smart-computers/In PDF document text
    • https://www.yahoo.com/lifestyle/tagged/health/In PDF document text
    • https://en.wikipedia.org/wiki/BPIn PDF document text
    • https://www.japantimes.co.jp/article-expired/In PDF document text
    • http://www.philly.com/philly/archives/In PDF document text
    • https://www.sciencenews.org/searchIn PDF document text
    • https://www.autoblog.com/In PDF document text
    • https://www.forbes.com/fdc/welcome_mjx.shtmlIn PDF document text
    • http://www.myway.com/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_off00005008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5008 10404 bytes
SHA-256: 4e0a6d674ac251b17c5e7db2edf659e31b1322aafcfea6d5f785455a756f1bc6
font_01_sfnt_off0000710e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x710E 7708 bytes
SHA-256: 4d90f8b953307968c9d45823207bad66006dbde2c3ad0a813b596f1224aa062e