Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc4339876310390…

MALICIOUS

PDF

35.4 KB Created: 2018-06-11 08:09:22 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: eaf8d00bffa1c6f8ce278be8f57cd5f9 SHA-1: 9e1416bf447fcd98f4abce49de762dbc3f2293ca SHA-256: 6dc43398763103901dad31f2d8349a6e8e5bdea9155a7b2715f7c889da138b25
102 Risk Score

Malware Insights

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

The PDF file is identified as a fake download lure using SEO poisoning. It contains multiple links to `uncpbisdegree.com`, which is likely hosting a malicious payload disguised as a Toyota Hiace service manual. The ML classifier also flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9062

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=toyota-hiace-service-manual-2005.pdf
    • http://uncpbisdegree.com/download4.php?q=toyota-hiace-service-manual-2005.pdf
    • http://www.motore.com.au/toyota-corolla-workshop-service-and-maintenance-manual/index.php
    • https://www.japanesevehicles.com/stocklist.php?make=TOYOTA&smodel=HIACE
    • http://www.allcarmanuals.com/models-Toyota.html
    • http://www.customcoasterconversions.com.au/Toyota-Hiace-Commuter-4x4.html
    • http://www.megalawbooks.com/toyota-hilux-diesel-workshop-manual-1990.pdf
    • http://repairservicemanuals.com/Toyota
    • http://www.winchbooks.com.au/toyota-hilux-workshop-repair-manual/
    • http://www.toyota-tech.eu/Aim/Aim.aspx
    • http://scifleettoyota.com.au/
    • http://www.contactcustomerservicenow.com/contact-toyota-customer-service/
    • http://www.toyota-tech.eu/Aim/Aim.aspx?pubtype=AOM
    • http://www.jacars.net/?p=6
    • http://www.jacobtoyota.com.au/used-car/list/
    • http://www.autolanka.com/toyota/
    • http://www.stewarttoyota.com.au/stock/search/?vehicletypeused=true&search=true
    • http://www.toyota-car-parts.co.za/models/used-toyota-rav4-spares/
    • http://www.toyota-car-parts.co.za/models/
    • http://www.toyota-car-parts.co.za/list-scrap-yard/
    • http://ph.priceprice.com/Toyota-Fortuner-9687/
    • http://uncpbisdegree.com/1/sylvia-mader-lab-manual-answer-key.pdf
    • http://uncpbisdegree.com/1/serious-about-your-sport-triathlon.pdf
    • http://uncpbisdegree.com/1/the-children-of-silence-a-frances-doughty-mystery-the-frances-doughty-mysteries.pdf
    • http://uncpbisdegree.com/1/springtime-the-new-student-rebellions.pdf
    • http://riverside-resort.net/1/uttar-pradesh-road-map-1st-edition.pdf
    • http://uncpbisdegree.com/1/the-darkest-part-of-woods-ramsey-campbell.pdf
    • http://uncpbisdegree.com/1/the-boys-the-name-of-the-game-v-1.pdf
    • http://uncpbisdegree.com/1/the-haunted-house-unabridged.pdf
    • http://uncpbisdegree.com/1/solution-soil-erosion.pdf
    • http://uncpbisdegree.com/1/the-department-of-lost-amp-found-allison-winn-scotch.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://www.aliexpress.com/w/wholesale-toyota-hiace-mirror.html
    • https://www.carsales.com.au/cars/toyota/hiace/
    • https://carfromjapan.com/cheap-used-toyota-hiace-van-for-sale
    • https://carfromjapan.com/cheap-used-cars-for-sale
    • https://carfromjapan.com/cheap-used-toyota-for-sale
    • https://www.trademe.co.nz/motors/used-cars/toyota
    • https://en.wikipedia.org/wiki/Toyota_Alphard
    • https://en.wikipedia.org/wiki/Scion_tC
    • https://www.carid.com/2017-toyota-tacoma-accessories/
    • https://www.carid.com/shop-by-product/
    • https://www.carid.com/toyota-accessories/
    • https://www.carid.com/toyota-tacoma-accessories/
    • http://go.microsoft.com/fwlink/?LinkId=521839&CLCID=0409
    • http://go.microsoft.com/fwlink/?LinkID=246338&CLCID=0409
    • https://go.microsoft.com/fwlink/?linkid=868922
    • http://go.microsoft.com/fwlink/?LinkID=286759&CLCID=409
    • http://go.microsoft.com/fwlink/?LinkID=617297
    +1 more URL(s)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e91.bin
9bb4b701c7b7a213e7766ef368f33403e0119d510ed4948ef1a89ce490fc2f90
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E91 9836 bytes
font_01_sfnt_off00006ddd.bin
4834bb3ae5a1765294722e05c6efc075d5b1a47ea1c9aa6daa1daf7ef72a592c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDD 7432 bytes