Malicious PDF — malware analysis report

Static analysis result for SHA-256 410102a0455a1452…

MALICIOUS

PDF

40.6 KB Authoring application: LibreOffice
MD5: 0beb329ac5cd9454593bda40928c84b2 SHA-1: e6181e76b96f902f9692a57fdb47b9698fb5b9b2 SHA-256: 410102a0455a1452b590f57176175c7413bdfcc714a630615b5a067bbfc113e3
150 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, as indicated by the PDF_SEO_LINK_FARM heuristic. This technique is often used for SEO spam or to direct users to malicious content. The ML classifier and ClamAV detection further support the malicious nature of this file. No scripts were extracted from this sample.

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://accessmudjimbashores.com/uploads/1/3/0/4/130483862/memeb.pdf
    • http://nuevavistamenorca.com/uploads/1/3/0/6/130639977/zuveworibigu_lugififax.pdf
    • http://artclassdallas.com/uploads/1/3/0/3/130313491/tuxamewezuxunares.pdf
    • http://citylightstheaters.com/uploads/1/3/0/7/130774999/5154354.pdf
    • http://www.mnixonsclassroom.com/uploads/1/3/0/2/130288661/tuzurarejuba-nelelanone-bemesulomutan.pdf
    • http://nxnaturallife.com/uploads/1/3/0/4/130476130/loxutetuxid.pdf
    • http://www.sarahsclub.com/uploads/1/3/0/2/130287537/sogiwekosibudedasij.pdf
    • http://varliakademi.com/uploads/1/3/0/5/130542935/kujasi-kijewiguzimepo-pajilu.pdf
    • http://www.thewoolpeddler.com/uploads/1/3/0/4/130483489/4420d8.pdf
    • http://morgana.club/uploads/1/3/0/6/130605299/roxerumu.pdf
    • http://pagostotal.com/uploads/1/3/0/5/130544672/f95748850.pdf
    • http://greatdentalwork.com/uploads/1/3/0/8/130814042/5998272.pdf
    • http://aquirelotb.com/uploads/1/3/0/7/130775440/7085836.pdf
    • http://contributingtominers.com/uploads/1/3/0/4/130435891/rubuki-degimeb-xuzowikuw-lugutosukib.pdf
    • http://taynaraconti.com/uploads/1/3/0/5/130590273/begegoburirifarurika.pdf
    • http://huangguanzuqiukaihuwang.br3h.com/uploads/1/3/0/4/130436473/130436473.html#best+kindle+ereader+2019

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004376.bin
1c87aad865f2ce39330b47b64b541b8ae7da50d032570391d7859c9fce11be2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4376 8064 bytes

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