Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e768afbbd1aa54…

MALICIOUS

PDF

1.25 MB Created: 2011-08-08 19:03:19 Authoring application: Microsoft® Office Word 2007
MD5: f6e8a59444b3c444847d8ae260f28eae SHA-1: 340beff0b95835073e8173573ebef8b5d89528ea SHA-256: 25e768afbbd1aa5467562c97528aece8db2dcdfe1005e4ee7f0191bcfae71310
62 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV with the signature Pdf.Dropper.Agent-7096549-0, strongly suggesting its purpose is to act as a dropper for other malware. While the document body is heavily obfuscated and unreadable, the presence of multiple embedded URLs, even those marked as benign, is typical for phishing or social engineering lures. The primary function appears to be downloading and executing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0013

Heuristics 3

  • ClamAV: Pdf.Dropper.Agent-7096549-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7096549-0
  • 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://cache.gawkerassets.com/assets/images/17/2011/08/nxms3x2b_1.jpg
    • http://cache.gawkerassets.com/assets/images/17/2011/08/71aumzmbxpl._aa1200_.jpg
    • http://cache.gawkerassets.com/assets/images/17/2011/08/81r9zripsvl._aa1500_.jpg
    • http://www.jonnyguru.com/
    • http://extreme.outervision.com/psucalculatorlite.jsp
    • http://cache.gawkerassets.com/assets/images/17/2011/08/neweggreviews.png
    • http://frys.com/
    • http://cache.gawkerassets.com/assets/images/17/2011/08/step1.jpg
    • http://cache.gawkerassets.com/assets/images/17/2011/08/step2_01.jpg
    • http://cache.gawkerassets.com/assets/images/17/2011/08/step25.jpg
    • http://cache.gawkerassets.com/assets/images/17/2011/08/step3.jpg
    • http://cache.gawkerassets.com/assets/images/17/2011/08/step5.jpg
    • http://cache.gawkerassets.com/assets/images/17/2011/08/step7.jpg
    • http://cache.gawkerassets.com/assets/images/17/2011/08/step84.jpg
    • http://cache.gawkerassets.com/assets/images/17/2011/08/cablemanagement.jpg
    • http://cache.gawkerassets.com/assets/images/17/2011/08/turniton.jpg
    • http://cache.gawkerassets.com/assets/images/17/2011/08/windowsupdate.png
    • https://www.facebook.com/WhitsonGordonFanPage
    • https://twitter.com/kindrudekid
    • http://lifehacker.com/5684015/crafting-the-perfect-computer-spec-list
    • http://www.iec.ch
    • http://www.newegg.com/Store/SubCategory.aspx?SubCategory=10&name=Desktop-PCs
    • http://lifehacker.com/5796846/why-clock-speed-doesnt-matter-much-when-comparing-two-computer-processors
    • http://lifehacker.com/5580998/a-beginners-guide-to-overclocking-your-intel-processor
    • http://lifehacker.com/5570909/how-to-prevent-your-computer-from-overheating-and-why-its-important
    • http://www.anandtech.com/
    • http://www.anandtech.com/bench/GPU11/188
    • http://lifehacker.com/5586733/how-to-take-full-advantage-of-your-solid+state-drive
    • http://www.newegg.com/
    • http://www.microcenter.com/
    • http://reddit.com/r/buildapc
    • http://www.tomshardware.com/forum/
    • http://lifehacker.com/openthread
    • http://pcpartpicker.com/
    • http://www.youtube.com/watch?v=ERhxmzQR6xA
    • http://pcsupport.about.com/od/fixtheproblem/tp/ami-beep-codes.htm
    • http://pcsupport.about.com/od/fixtheproblem/tp/award-beep-codes.htm
    • http://pcsupport.about.com/od/fixtheproblem/tp/phoenix-beep-codes.htm
    • http://www.reddit.com/r/buildapc
    • http://lifehacker.com/5827491/how-to-build-a-computer-from-scratch-lesson-3-building-the-computer
    • http://lifehacker.com/5778882/getting-started-with-linux-the-complete-guide
    • http://lifehacker.com/5672051/how-to-build-a-hackintosh-mac-and-install-os-x-in-eight-easy-steps
    • http://www.howtogeek.com/howto/the-geek-blog/building-a-new-computer-part-3-setting-it-up/
    • http://lifehacker.com/5826909/lifehacker-pack-for-windows-our-list-of-the-best-windows-downloads
    • http://www.tomshardware.com/
    • http://www.anandtech.com/bench/
    • http://www.extremetech.com/
    • http://tinyurl.com/FalconGuide
    • http://www.youtube.com/user/NCIXcom
    • http://www.youtube.com/user/linustechtips
    +13 more URL(s)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_014_off0004a5ed.bin
e07c2eb39075a40a70ce966f113976bc719d732347857bf0dad07f2478ff72a4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5ED 213300 bytes
stream_046_off000f498a.bin
66e38c40aa93c3566a91324c82bd15fa3570ad541822a2e95e86bbc5322dfdfb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF498A 197488 bytes

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