Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa282cea6f2f864…

MALICIOUS

PDF

35.8 KB Authoring application: PDFBox
MD5: 75f50a0c591946649c35fdc4d0cb6885 SHA-1: 2ed9ba1407b17078128fcd078fa754810c080330 SHA-256: 6aa282cea6f2f864d9f0913cd282b3de51ba64b4cff0db8abaa9b9e59306183d
192 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique commonly used in phishing campaigns to distribute malware. The ClamAV detection and ML classifier also indicate malicious intent. The document body appears to be corrupted or obfuscated, but the presence of numerous URLs strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://njetd.com/uploads/1/3/0/5/130550684/wururigubozebo.pdf
    • http://alittlesernity.shop/uploads/1/3/0/3/130379415/xipotixupekebudizol.pdf
    • http://chihuahuafrentealcambioclimatico.com/uploads/1/3/0/4/130490444/davekurukin.pdf
    • http://stampexinternational.com/uploads/1/3/0/4/130435499/redoberiralibokafej.pdf
    • http://amdlifestylemgmt.com/uploads/1/3/0/5/130540128/tibenepurinuzomopow.pdf
    • http://djpoolie.com/uploads/1/3/0/2/130270991/a6221d46.pdf
    • http://sublimetravels.com/uploads/1/3/0/7/130776066/xalolan_nujatagejoxe.pdf
    • http://mrallenscience.com/uploads/1/3/0/6/130620551/130620551.html#nsk+one+way+clutch+bearing

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001177.bin
a4ab6ee7adb56da50e8f023f969215e36250443ad567d488642a57a6ebdfdb1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1177 8176 bytes

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