Malicious PDF — malware analysis report

Static analysis result for SHA-256 1177edf1cecf2e82…

MALICIOUS

PDF

55.6 KB Authoring application: Inkscape
MD5: 236e7e964ef7b47223da43e6fe242f61 SHA-1: 95c957046f4372c1b3ed1e2ab539f05c053d1370 SHA-256: 1177edf1cecf2e82e89f88ce28654b1075e2a3fba6b322ebfc67ebba46455243
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing attempt. The document body, though heavily obfuscated, contains numerous URLs pointing to other PDF files, suggesting a link farm designed to distribute malware. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kylienicolejeffries.com/uploads/1/3/0/6/130620627/f49b43743f.pdf
    • http://avneetbansal.com/uploads/1/3/0/5/130551210/3c45cf92969a7.pdf
    • http://mymoneybuilder.net/uploads/1/3/0/6/130621216/wopobakusupavotomul.pdf
    • http://wutojeki.gurmen.ru/uploads/2020/01/28/tukufobibuwinum.pdf
    • http://lonelyroadhandcraftedllc.com/uploads/1/3/0/3/130313603/jugezidej.pdf
    • http://emilymullikindesign.com/uploads/1/3/0/6/130621988/nazoromizefuve_wunod_wemigabidamevap.pdf
    • http://spacharter.org/uploads/1/3/0/6/130604636/4076619.pdf
    • http://ncln.com/uploads/1/3/0/5/130550675/gibezivej.pdf
    • http://riveflowyoga.com/uploads/1/3/0/5/130589337/punegasavaz.pdf
    • http://cecilyeiferle.com/uploads/1/3/0/6/130621758/130621758.html#alif+novel+episode+5+pdf+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000083eb.bin
3fda0b6bf72a01037c99f886861bab2cb6978dd2684065e223af8b96a4aad296		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x83EB 22444 bytes
font_00_sfnt_off00001214.bin
2caca2a9761e0496746479f03f6b7da3e91be215c1ff0210212c1c02142effdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1214 8212 bytes
font_01_sfnt_off00007935.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7935 2616 bytes

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