Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ee1fe52d36cc79…

MALICIOUS

PDF

30.8 KB Created: 2018-06-11 09:19:51 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a10696e5dd09781c014767d343011e28 SHA-1: f80fd43a9b65597489f18d9679d8de59433bab64 SHA-256: 22ee1fe52d36cc79b2f9eb2e23ade64c586798e83893e606105d77eda396e1a6
130 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and heuristics indicating it is a fake download lure designed for SEO poisoning. The document body contains multiple embedded links to 'uncpbisdegree.com', which likely serves as a gateway to distribute malicious content. No scripts were extracted, and the primary attack vector appears to be social engineering via a deceptive download link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9382

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=social-psychology-unknown-binding-elliot-aronson.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=social-psychology-unknown-binding-elliot-aronson.pdfIn PDF document text
    • http://ilocis.org/documents/chpt34e.htmIn PDF document text
    • https://treasury.govt.nz/publications/wp/theories-family-and-policy-wp-04-02-htmlIn PDF document text
    • http://www.lawneuro.org/bibliography.phpIn PDF document text
    • http://www.123helpme.com/search.asp?text=paralysisIn PDF document text
    • http://uncpbisdegree.com/1/this-pretty-planet-chords.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-smurfs-and-the-howlibird-smurfs-graphic-novels-paperback.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-truth-of-the-pacific-war-soulful-messages-from-hideki-tojo-japans-wartime-leader.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-wind-not-caught-in-a-net-the-buddha-on-the-nature-of-knowing.pdfIn PDF document text
    • http://uncpbisdegree.com/1/theological-ferment-personal-reflections.pdfIn PDF document text
    • http://uncpbisdegree.com/1/thinking-about-g-del-and-turing-essays-on-complexity-1970-2007.pdfIn PDF document text
    • http://uncpbisdegree.com/1/van-hool-service-shecklist.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-thorn-and-blossom-theodora-goss.pdfIn PDF document text
    • http://uncpbisdegree.com/1/too-pretty-to-die-a-debutante-dropout-mystery-book-5.pdfIn PDF document text
    • http://uncpbisdegree.com/1/uss-alexander-hamilton.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/FreudIn PDF document text
    • https://medium.com/@tweetingmouse/the-truth-has-got-its-boots-on-what-the-evidence-says-about-mr-damores-google-memo-bc93c8b2fdb9In PDF document text
    • http://www.philly.com/philly/archives/In PDF document text
    • http://www.loot.co.za/index/html/index3927.htmlIn 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_off00003c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C76 10376 bytes
SHA-256: 5c423c6de9660f66284b7d219053f687c1d58f3a5cd9624d7b7759369cd9b947
font_01_sfnt_off00005d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D73 7540 bytes
SHA-256: 3b70b638c0350aeed0bb57445b9ad8d4ff4c7c3ef232ffd9c0158c415f741466

Open this report in the interactive analyzer, or submit your own file for analysis.