Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a9dcc1468a3633c…

MALICIOUS

PDF

31.2 KB Created: 2018-06-11 08:41:15 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: 85e42ddca50bf7d67f1373b657ceb4aa SHA-1: 6ef4d44be12c4b7536c1eb7ebadce50ba9ce1ac3 SHA-256: 0a9dcc1468a3633c114fe47e26d5ac8aed37d8461d61364907ec2d1e2b2e3d54
102 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a fake download lure, specifically using SEO poisoning to trick users into downloading a malicious file. The document body and extracted URLs point to a download page for a Toyota ECU diagram, which is likely a pretext for delivering malware. The primary IOCs are the URLs associated with the fake download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9479

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-4e-fe-ecu-diagram.pdf
    • http://uncpbisdegree.com/download4.php?q=toyota-4e-fe-ecu-diagram.pdf
    • http://www.apexi.co.jp/pdf/products/rsm_wiring_e.pdf
    • http://www.clubdediagramas.com/archivo/autos-a12/
    • http://www.oldclassiccar.co.uk/modernads_make/toyota.htm
    • http://www.tools111.com/
    • http://new-hampshire.press/Strafford_County-New_Hampshire/Strafford_County-New_Hampshire_ho.php
    • http://hamburggermany.men/Hamburg-Germany/Hamburg-Germany_bb.php
    • https://1mbed.com/
    • http://uncpbisdegree.com/1/sony-vgn-cr115e-laptops-owners-manual.pdf
    • http://riverside-resort.net/1/volvo-penta-boat-motors.pdf
    • http://riverside-resort.net/1/yamaha-portable-grand-dgx-202-manual.pdf
    • http://uncpbisdegree.com/1/springboard-algebra-1-unit-5-answers.pdf
    • http://uncpbisdegree.com/1/signals-systems-transforms-solutions-manual.pdf
    • http://uncpbisdegree.com/1/the-crow-comic-book-free.pdf
    • http://uncpbisdegree.com/1/subtraction-word-problems-with-decimals.pdf
    • http://uncpbisdegree.com/1/the-hedgehog-an-owner-apos-s-guide-to-a-happy-healthy-pe.pdf
    • http://riverside-resort.net/1/vw-090-automatic-transmission-manual.pdf
    • http://uncpbisdegree.com/1/space-cadet-robert-a-heinlein.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://www.manualslib.com/manual/450191/Apexi-S-Afcii-Safc-2.html
    • https://www.manualslib.com/brand/apexi/air-conditioner.html
    • https://www.manualslib.com/products/Apexi-S-Afcii-Safc-2-2777636.html
    • https://www.tacomaworld.com/threads/how-to-1gr-fe-supercharger-installation.101770/
    • https://www.tacomaworld.com/forums/
    • https://www.tacomaworld.com/categories/tacoma-garage.7/
    • https://www.tacomaworld.com/forums/technical-chat.10/
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=FR_EN&a=https%3a%2f%2f1mbed.com%2f
    • http://go.microsoft.com/fwlink/?LinkID=617350
    • 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003f24.bin
82cf84b972e7e8bc9e54fca0aa846825485110b2bcabd683aab4f9e18a20511d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3F24 10300 bytes
font_01_sfnt_off00005fe5.bin
c7a6400d6d3601bac1407bb4e97754d15a13ab7c896b6ae7b274d19437675832		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE5 6996 bytes

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