Malicious PDF — malware analysis report

Static analysis result for SHA-256 9863f298210b9b27…

MALICIOUS

PDF

38.1 KB Authoring application: LibreOffice
MD5: 03bbe33ee69c45493101c1ff3b32f502 SHA-1: 12a8da7d4030afac999fcca495e83a00b7f37460 SHA-256: 9863f298210b9b278e347c9b0e3a30e3300e0276daa65462d62b45274d754898
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files, disguised as a Scrabble word list. This technique is commonly used for SEO poisoning or to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature. The primary attack pattern involves luring users to a potentially compromised website 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://woodside2-3-4hoa.org/uploads/1/3/0/3/130323554/kekanavugerekef.pdf
    • http://www.tobywood.com/uploads/1/3/0/9/130969427/3263438.pdf
    • http://starbranchdesigns.com/uploads/1/3/0/6/130604924/b5e0f.pdf
    • http://oraclevms.com/uploads/1/3/0/3/130313613/98101cdb86.pdf
    • http://obconstructionllc.com/uploads/1/3/0/5/130589354/74dc87963ae1e1.pdf
    • http://admin.evolvetransitiontrust.org/uploads/1/3/0/6/130605077/pitimud.pdf
    • http://rnjsmoked.com/uploads/1/3/0/4/130435925/karifi-bivedunekon-fugewak.pdf
    • http://www.lawnbymagnums.com/uploads/1/3/0/4/130436367/5784943.pdf
    • http://goodbyesonline.com/uploads/1/3/0/6/130621300/1298590.pdf
    • http://8ii8.us/uploads/1/3/0/5/130550760/6872765.pdf
    • http://stylebydesiree.com/uploads/1/3/0/5/130589077/nabule-bisege-kuxabekajilil-lepilag.pdf
    • http://mail.susan-zises.com/uploads/1/3/0/4/130478602/346494.pdf
    • http://aloeorganicsskincare.com/uploads/1/3/0/5/130589133/lenefatowig.pdf
    • http://tinyconcorde.com/uploads/1/3/0/7/130739156/topofegaxidumug.pdf
    • http://whatwonderfulwine.com/uploads/1/3/0/6/130604295/79b78e575.pdf
    • http://ofoptical.com/uploads/1/3/0/7/130738754/xibutaromugebi.pdf
    • http://www.ophsclassof1999.com/uploads/1/3/0/2/130289466/tobevetojab-kotutaruvupu.pdf
    • http://casadelvalleygalindo.com/uploads/1/3/0/8/130814562/binaweku.pdf
    • http://mx.adornkids.com/uploads/1/3/0/6/130640024/26d0f.pdf
    • http://mci-ourhotelsportal.devsite-1.com/uploads/1/3/0/6/130605244/130605244.html#scrabble+2+letter+word+list

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003444.bin
0539a0752c2dc77d383f48b9dea1b4e8c3e6b2f8d9675ca65d47e96c3c69c8f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3444 8692 bytes

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