Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41ba0a598ff6549…

MALICIOUS

PDF

40.2 KB Authoring application: Mobipocket Creator
MD5: eac01932363d4fce50be4e658a46a4b2 SHA-1: dde7f5ff805576cf2169c5bb378fcfe6c0c34c00 SHA-256: c41ba0a598ff6549d995a0802b897c66d4567894cb0c210c6d67a67d30d54ee8
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious payloads. The ClamAV detection and ML classifier strongly suggest malicious intent, aligning with the PDF_SEO_LINK_FARM heuristic.

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://shopcariscloset.com/uploads/1/3/0/6/130604725/wowefole_donugekikag_torat_xugiz.pdf
    • http://lnstagram-helpservice.com/uploads/2020/01/27/3668738.pdf
    • http://island-jewelsinc.com/uploads/1/3/0/2/130274349/gukilodaku_rozeruxibef_nupajife.pdf
    • http://lisaruth.net/uploads/1/3/0/6/130620456/zadilu.pdf
    • http://bilijogi.loza.pro/uploads/2020/01/27/zirovezuxemote-mixalonokaxof-lunedemoj.pdf
    • http://mapsoftheoldwest.com/uploads/1/3/0/4/130489446/gaxoxivobojexagito.pdf
    • http://zejoxi.reshenie-krasnogorsk.ru/uploads/2020/01/27/9155131.pdf
    • http://sazizusob.fitootvet.ru/uploads/2020/01/28/guzenalod.pdf
    • http://dojozipo.sergi-black-rose.ru/uploads/2020/01/27/sufif.pdf
    • http://mukaxojipa.pokupka-perfecto.ru/uploads/2020/01/27/4466889.pdf
    • http://gukago.vsebaseiny.ru/uploads/2020/01/28/29ae93bc0.pdf
    • http://northcoloradomedevac.com/uploads/1/3/0/5/130543155/722cc.pdf
    • http://justinbdennis.com/uploads/1/3/0/5/130543494/salizalad-pibibamepav.pdf
    • https://zexupimifosirof.weebly.com/uploads/1/3/0/5/130543476/8010980.pdf
    • http://nupir.silaneguardbuy.info/uploads/2020/01/29/7978568.pdf
    • http://noj.anonima-net.fun/uploads/2020/01/27/zigefamap-jovolad-xawademoniz-jajaluwi.pdf
    • http://tbrubel.weebly.com/uploads/1/3/0/6/130604780/gosodomub_labonole.pdf
    • http://mackenzieemievents.com/uploads/1/3/0/5/130588998/3008752976.pdf
    • http://worldwidegreatescapes.com.au/uploads/1/3/0/4/130478551/130478551.html#apostila+de+calculo+de+caldeiraria+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000016b0.bin
c088525d3cac677f4bb0074b63492aa47d6b112ca94a07353340f606e9db4c32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B0 10908 bytes

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