Malicious PDF — malware analysis report

Static analysis result for SHA-256 12de9407fbece1ff…

MALICIOUS

PDF

45.7 KB Authoring application: Mobipocket Creator
MD5: 3107076c02488f98a5f2867e18b481ca SHA-1: c45830e8f1954870451663d1adc16494b7a2c1cd SHA-256: 12de9407fbece1ff5935a413306a9d2f877d402d3d893aba518b5bc4c9a83b4d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to potentially harmful content.

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://artispira.com/uploads/1/3/0/3/130313090/jefik.pdf
    • http://ziti.vipiska-egrn-besplatno2.icu/uploads/2020/01/28/c4cab06074.pdf
    • http://xipa.soho-sumki.icu/uploads/2020/01/28/fimebuvusebakofoxo.pdf
    • http://puttingontheglitzlm.com/uploads/1/3/0/4/130488816/076ba0.pdf
    • http://duwopi.kriptobalkan.org/uploads/2020/01/27/a771db631c5.pdf
    • http://duza.wiki-compac.info/uploads/2020/01/29/3a6c7b836842.pdf
    • http://swellbathrooms.com/uploads/1/3/0/6/130622089/cc38b987.pdf
    • http://besthairreplacementnc.com/uploads/1/3/0/4/130436050/fibofadesisise_sudeme.pdf
    • http://nino.cuefa.club/uploads/2020/01/28/2540789.pdf
    • http://mysustainabletransportation.com/uploads/1/3/0/4/130483260/138e82e423091.pdf
    • http://mediationparalegalboulder.com/uploads/1/3/0/4/130483394/7712047.pdf
    • https://fozawovul.weebly.com/uploads/1/3/0/3/130312957/8366185.pdf
    • http://perfectbalancenutrition.org/uploads/1/3/0/5/130550901/588027.pdf
    • https://potutifet.weebly.com/uploads/1/3/0/4/130490488/janudafigozal-bizada-daniwu-kudagabedizivo.pdf
    • http://lovelizex.com/uploads/1/3/0/4/130436139/wixipejujepusi.pdf
    • http://almostarthistory.com/uploads/1/3/0/6/130603772/jedawaximazofem-jikigav.pdf
    • http://nexuvuvu.rollosolar.com/uploads/2020/01/27/4224262.pdf
    • http://rsschel.ru/uploads/2020/01/27/biwiwupix_kupivivi.pdf
    • http://bajek.itraktor.ru/uploads/2020/01/28/4169c054bd1187.pdf
    • https://gomewulaveso.weebly.com/uploads/1/3/0/5/130539440/dagujufe_ralure_tupetorafesiru_timek.pdf
    • http://oakclass.com/uploads/1/3/0/6/130639781/130639781.html#ccnav6+chapter+2+answers
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015ee.bin
20f76d5b5ee19cfa245efd26d6c73baa1140d701a6baa31d94e392389b1c5f44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15EE 8252 bytes
font_01_sfnt_off00006bc7.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC7 16036 bytes

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