Malicious PDF — malware analysis report

Static analysis result for SHA-256 9743b062ad02d55f…

MALICIOUS

PDF

49.6 KB Created: 2018-06-11 09:22:56 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 97576389fac4e824c99164685bc485a1 SHA-1: 08dd6ad15beec55978f68812448c93f998954bf7 SHA-256: 9743b062ad02d55fda175da7407f0b3980d570d812c78eee6ee1ec62e17b748a
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains embedded URLs and a document body that mimics search results for 'ww1 scavenger hunt answers'. The primary malicious indicator is the PDF_URI heuristic firing on http://uncpbisdegree.com/download3.php?q=ww1-scavenger-hunt-answers.pdf, suggesting this is a lure to download a potentially malicious file. The ML classifier also flagged the PDF as malicious with high confidence. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9083

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=ww1-scavenger-hunt-answers.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=ww1-scavenger-hunt-answers.pdfIn PDF document text
    • https://www.killeenisd.org/teacherDocs/c43/e49739/documents/WW1ScavengerHunt-129419.pdfIn PDF document text
    • http://yoonix.de/ww1/scavenger/ww1_scavenger_hunt_answers.pdfIn PDF document text
    • http://tiomar.de/ww1/scavenger/ww1_scavenger_hunt_answers.pdfIn PDF document text
    • http://suenet.de/ww1/scavenger/ww1_scavenger_hunt_answers.pdfIn PDF document text
    • http://fhs.fms.k12.nm.us/Teachers/Jburleson/WWIIn PDF document text
    • http://portfolio.fcps1.org/itrt/TaskIn PDF document text
    • http://riverside-resort.net/1/staar-test-answer-key-2018.pdfIn PDF document text
    • http://riverside-resort.net/1/stygians-honor-breeds-27-lora-leigh.pdfIn PDF document text
    • http://riverside-resort.net/1/solution-of-partial-differential-equations.pdfIn PDF document text
    • http://riverside-resort.net/1/truck-tire-repair-shops-near-me.pdfIn PDF document text
    • http://riverside-resort.net/1/struggles-of-indian-federalism-1st-edition.pdfIn PDF document text
    • http://riverside-resort.net/1/sony-kds-55a2000-tvs-owners-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/tuck-everlasting-answer-to-packet-questions.pdfIn PDF document text
    • http://riverside-resort.net/1/trade-policy-and-the-global-participitation-the-indian-experience-1st-edition.pdfIn PDF document text
    • http://riverside-resort.net/1/the-imperial-japanese-army-the-invincible-years-1941-42-general-military.pdfIn PDF document text
    • http://riverside-resort.net/1/thinkwell-answers.pdfIn PDF document text
    • https://www.killeenisd.org/.../documents/WW1ScavengerHunt-129419.pdfIn PDF document text
    • http://www.historychannel.com/ww1/franzferdinandIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://quizlet.com/33895166/world-war-1-scavenger-hunt-list-flash-cards/In PDF document text
    • https://quizlet.com/36110180/world-war-i-scavenger-hunt-flash-cards/In PDF document text
    • https://view.officeapps.live.com/op/view.aspx?src=http%3A%2F%2Fportfolio.fcps1.org%2Fitrt%2FTask%2520Cards%2F6_World%2520War%2520I%2520Scavenger%2520Hunt.docIn PDF document text
    • https://www.teacherspayteachers.com/Product/World-War-I-World-War-1-Key-People-Scavenger-Hunt-1888514In PDF document text
    • http://www.educationworld.com/a_lesson/internet-scavenger-hunt/d-day-answer-key.shtmlIn PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=617350In 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://quizlet.com/33895166/world-war-1-scavenger-hunt-list-flashIn PDF document text
    • https://quizlet.com/36110180/world-war-i-scavenger-hunt-flash-cardsIn PDF document text
    • https://www.teacherspayteachers.com/Product/World-War-I-World-WarIn 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_off00007563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7563 14480 bytes
SHA-256: 82dc4403258139dfa977a64e74b05cf33eff5b67ce46ae60e6e980e129ff8df8
font_01_sfnt_off0000a19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA19B 8752 bytes
SHA-256: 4323cb741d1add35d54c840964ef86a91d914e7865435c38cb425888d72937a4