Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcca89e610275e2d…

MALICIOUS

PDF

30.3 KB Created: 2018-06-11 08:26:38 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 522697ec2d6460545804fbf2d679b127 SHA-1: 296116b5dfd1c6fd5fb4c217a318d87ccbd0af00 SHA-256: fcca89e610275e2dbcac964bdf8b10366968bcc0fd9b4cb83397a0b2600ca8dc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was identified as malicious by an ML classifier and contains heuristics indicating it is a fake download lure. The document body and extracted URLs point to a domain designed to trick users into downloading a file, likely malware, by disguising it as a book or media download. The primary malicious URLs are associated with a fake SEO-poisoning download gateway.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9686

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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-butcher-of-anderson-station-expanse-05-james-sa-corey.pdf PDF link annotation
    • http://uncpbisdegree.com/download4.php?q=the-butcher-of-anderson-station-expanse-05-james-sa-corey.pdfIn PDF document text
    • https://1mbed.com/In PDF document text
    • http://riverside-resort.net/1/toyota-highlander-ac-problems.pdfIn PDF document text
    • http://riverside-resort.net/1/stop-aging-now-coupon.pdfIn PDF document text
    • http://riverside-resort.net/1/the-agricola-and-germania-tacitus.pdfIn PDF document text
    • http://riverside-resort.net/1/the-lifeready-woman-thriving-in-a-do-it-all-world.pdfIn PDF document text
    • http://riverside-resort.net/1/the-book-of-lists-the-original-compendium-of-curious-information.pdfIn PDF document text
    • http://riverside-resort.net/1/the-christmas-star.pdfIn PDF document text
    • http://riverside-resort.net/1/tusk-enduro-wiring-diagram.pdfIn PDF document text
    • http://riverside-resort.net/1/the-directory-of-gold-and-silversmiths-jewellers-and-allied-traders-1838-1914.pdfIn PDF document text
    • http://riverside-resort.net/1/some-kind-of-peace-camilla-grebe.pdfIn PDF document text
    • http://riverside-resort.net/1/tai-chi-chuan-a-simplified-method-of-calisthenics-for-health-self-defense.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/James_S._A._CoreyIn PDF document text
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=FR_EN&a=https%3a%2f%2f1mbed.com%2fIn PDF document text
    • https://www.amazon.com/movies-tv-dvd-bluray/b?node=2625373011In PDF document text
    • http://music.163.com/In PDF document text
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=ZH-CHS_EN&a=http%3a%2f%2fmusic.163.com%2fIn 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://en.wikipedia.org/wiki/The_Expanse_In 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_off000039a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39A3 10688 bytes
SHA-256: 002b53a98e023a4d9b6b979680772113ce76292c15e5a103d21362fc51ffc86a
font_01_sfnt_off00005b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7C 7680 bytes
SHA-256: 3a88c9bcea8facd902209b3b78419f85ba2541454a6daf06f26470fba1a371b1

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