Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5afbad16191331…

MALICIOUS

PDF

32.9 KB Created: 2018-06-11 09:08:41 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: e12a3458422af55ca26399373e22cfb7 SHA-1: 9da5558227792b2ef8e58e110d32605d5c566ad3 SHA-256: 7d5afbad16191331804878a463e57836af75b3d07f4b913115ddbaed0ebd9332
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics as a fake download lure and SEO spam gateway. The document body and embedded URLs point to the domain 'uncpbisdasdegree.com', which is used to distribute the malicious PDF. This suggests a phishing attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9340

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=the-essential-writings-of-christian-mysticism.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=the-essential-writings-of-christian-mysticism.pdfIn PDF document text
    • http://www.reversespins.com/dionysius.htmlIn PDF document text
    • http://www.innerchristianity.com/In PDF document text
    • http://www.freemasons-freemasonry.com/Adam_Kadmon.htmlIn PDF document text
    • http://www.drawnbylove.com/ScudderIn PDF document text
    • http://www.fritjofcapra.net/books/In PDF document text
    • http://www.friesian.com/Kant.htmIn PDF document text
    • http://www.newcalvinist.com/kellers-affinity-with-rome/keller-and-the-catholic-mystics/In PDF document text
    • http://www.equip.org/article/healing-touch-trouble-with-angels/In PDF document text
    • http://humanknowledge.net/Thoughts.htmlIn PDF document text
    • http://beginningandend.com/apostasy-alert-joel-osteen-and-oprah-preach-new-age-magic/In PDF document text
    • http://riverside-resort.net/1/thawing-the-ice-the-ice-series.pdfIn PDF document text
    • http://riverside-resort.net/1/sony-srf-m73-radios-owners-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/std-xth-algebra-maharashtra-board.pdfIn PDF document text
    • http://riverside-resort.net/1/the-hidden-window-mystery-nancy-drew-34-carolyn-keene.pdfIn PDF document text
    • http://riverside-resort.net/1/spas-made-in-italy.pdfIn PDF document text
    • http://riverside-resort.net/1/statistical-physics-of-fluids-basic-concepts-and-applications-1st-edition.pdfIn PDF document text
    • http://riverside-resort.net/1/skyline-r32-gtr.pdfIn PDF document text
    • http://riverside-resort.net/1/sharp-vl-h875u-camcorders-owners-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/sony-vgn-s380b-laptops-owners-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/sovereignty-games-instrumentalizing-state-sovereignty-in-europe-and-beyond.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://en.wikipedia.org/wiki/MysticismIn PDF document text
    • https://www.britannica.com/topic/mysticismIn PDF document text
    • https://en.wikipedia.org/wiki/GnosticismIn PDF document text
    • http://www.iep.utm.edu/gnostic/In PDF document text
    • https://www.britannica.com/topic/ChristianityIn PDF document text
    • http://web.cn.edu/kwheeler/lit_terms_F.htmlIn PDF document text
    • http://www.newadvent.org/cathen/07326a.htmIn PDF document text
    • http://www.newadvent.org/cathenIn PDF document text
    • http://www.newadvent.org/cathen/h.htmIn 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_off000044f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44F2 10432 bytes
SHA-256: e6d87db32b207d9bbb59e8e297db3a4b8d9d89dec27ba286d0864032cc111cb4
font_01_sfnt_off00006638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6638 7072 bytes
SHA-256: f0a546bedd8f827b96549bed21681f91e7f86803e435149400d9f472d8c9c67a