Malicious PDF — malware analysis report

Static analysis result for SHA-256 8907199c5ecae169…

MALICIOUS

PDF

38.6 KB Authoring application: PDFBox
MD5: 1202e40a1179500b51a7aa12573d41ee SHA-1: 5798777dc0427040aa0876d33cb00c52be7f1ddb SHA-256: 8907199c5ecae1694286a93103ea3308d8de1cb2fdcd99646ba78dbad7dc2e00
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to external PDF documents. This behavior is indicative of a link farm or a method to distribute malicious content under the guise of legitimate documents. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

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://makevotingmatter.net/uploads/1/3/0/5/130538945/7025517.pdf
    • http://mrtexel.com/uploads/1/3/0/5/130550774/334287.pdf
    • http://molasobi.viptip.pro/uploads/2020/01/27/7906391.pdf
    • http://woperazi.kultivator-tornado.xyz/uploads/2020/01/28/a321ed1e83bf73a.pdf
    • http://wallwalkers2015.com/uploads/1/3/0/3/130379681/galufuloweniru_bozativir_wanijokeme.pdf
    • https://jisuxekam.weebly.com/uploads/1/3/0/5/130590278/6185836.pdf
    • https://sigesavipubofi.weebly.com/uploads/1/3/0/3/130323392/24627aa8.pdf
    • http://bigexak.geltser.info/uploads/2020/01/27/3724881.pdf
    • https://xakokazamajo.weebly.com/uploads/1/3/0/5/130544652/pewula.pdf
    • http://jegiruw.darkempires.ca/uploads/2020/01/27/marumen.pdf
    • http://remepumuja.ttkhelo.com/uploads/2020/01/28/luxeriwofobarek_paxewuzuje.pdf
    • https://lizekogos.weebly.com/uploads/1/3/0/5/130547150/3253030.pdf
    • http://lodur.event-essence.com/uploads/2020/01/28/4f50ac4f4.pdf
    • http://cfthomas.com/uploads/1/3/0/3/130324451/130324451.html#personal+pronoun+and+possessive+pronoun+worksheets

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000155a.bin
35f9c2749326a07f10ec2786e9020e980886816c13635a2d6b72ccd790d38a32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155A 8276 bytes

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