Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2d5f51f4578155…

MALICIOUS

PDF

58.3 KB Authoring application: Mobipocket Creator
MD5: d31279e941cb01222c6bf2336bc555bb SHA-1: dddcb7a5ec4a3dff9d57d32d2da0f59c98b26a3e SHA-256: ee2d5f51f4578155e6aee67d9f0c81a82c63adbc9dcb98113c180d409af17de0
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The PDF_SEO_LINK_FARM heuristic identified a mass of external PDF links, with the first being http://myangelsandcherubs.com/uploads/1/3/0/6/130621988/51a225287.pdf. This indicates a likely phishing or malware distribution campaign leveraging a link farm to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://myangelsandcherubs.com/uploads/1/3/0/6/130621988/51a225287.pdf
    • http://sc2rax.online/uploads/2020/01/28/katipezapirutosefo.pdf
    • http://seattleyouthbasketballfoundation.com/uploads/1/3/0/3/130379049/7066453.pdf
    • http://mrsrashid.com/uploads/1/3/0/3/130379523/lapudewafe-kufopafisat-bepilotoli-tadijon.pdf
    • http://camelliacharlesjewelry.com/uploads/1/3/0/6/130622077/c43c12f.pdf
    • http://rejuvenatemedical.co.uk/uploads/1/3/0/2/130291874/d64c452.pdf
    • http://zavijowex.kuhni-msc09.icu/uploads/2020/01/28/8c2d62.pdf
    • http://juliewhitbyyoga.com/uploads/1/3/0/6/130621459/kojolodegibev.pdf
    • http://briankhorsand.com/uploads/1/3/0/5/130589042/rulasituvegukomadit.pdf
    • http://alex-kwon.com/uploads/1/3/0/6/130621915/wuluvapuraf.pdf
    • http://micropluscomputers.co.uk/uploads/1/3/0/4/130488387/a0c748.pdf
    • http://quintepaddlingclub.com/uploads/1/3/0/3/130313643/gejagefesudigo.pdf
    • http://zambiasafarihunting.com/uploads/1/3/0/5/130539428/130539428.html#iec+standards+list+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013f1.bin
a5bc79e2f68bb67ebd1657977f4b506f49f1b78b4c83428379a55b04195d8d61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1 8548 bytes

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