Malicious PDF — malware analysis report

Static analysis result for SHA-256 b797a7ec1d1224b3…

MALICIOUS

PDF

39.6 KB Authoring application: Nitro PDF First seen: 2020-12-25
MD5: ba2864a3f9b6a289992e2a0f85b26087 SHA-1: b3e020390cbd9cab50b9e81630a6b9c9c0ada3dd SHA-256: b797a7ec1d1224b330d300e56b7b99800c73bacf32d8beff18382f51d32b8a01
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malware. ClamAV and ML classifiers also flagged this file as malicious, specifically identifying it as a phishing or traffic-robot distribution. The embedded URLs are the primary IOCs, suggesting a campaign to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://mogulmeadows.org/uploads/1/3/0/4/130476447/327084.pdf In PDF document text
    • http://cestagift.com/uploads/1/3/0/4/130489572/80f020.pdfIn PDF document text
    • https://bapuvujupa.weebly.com/uploads/1/3/0/4/130435721/eeba95ea7.pdfIn PDF document text
    • http://newleaf-dayspa.com/uploads/1/3/0/5/130551994/wukufigade_gudiminamubig_mirikivepejasij_besojan.pdfIn PDF document text
    • http://kesibigol.ideibiznesa.biz/uploads/2020/01/27/voruwasolofimizi.pdfIn PDF document text
    • http://xek.supervasya.ru/uploads/2020/01/27/dapafasofuzipab-takiz-razari-xakeguzus.pdfIn PDF document text
    • http://boostersnetwork.com/uploads/1/3/0/2/130289580/6b554f0.pdfIn PDF document text
    • https://novolexe.weebly.com/uploads/1/3/0/5/130588435/be185ee6cd.pdfIn PDF document text
    • http://duduslimmer.com/uploads/1/3/0/5/130551416/c8a577d28.pdfIn PDF document text
    • http://messybeards.com/uploads/1/3/0/3/130379179/nafob.pdfIn PDF document text
    • http://limudoz.userboxes.ru/uploads/2020/01/27/ea89da685d.pdfIn PDF document text
    • http://sufe.oksustav.pw/uploads/2020/01/28/vodosefatejara_pojugepaw_voger_sumotejuk.pdfIn PDF document text
    • http://criticaluniversitystudies.net/uploads/1/3/0/6/130620637/3249133.pdfIn PDF document text
    • http://mikesrefinishing.com/uploads/1/3/0/2/130289541/1905208.pdfIn PDF document text
    • http://artevazada.com/uploads/2020/01/27/bekoxopatodinox.pdfIn PDF document text
    • https://neloziwogosido.weebly.com/uploads/1/3/0/5/130546977/1bc4e1d618.pdfIn PDF document text
    • http://xok.sportyers.com/uploads/2020/01/27/juwon_vuvese.pdfIn PDF document text
    • http://legacytransportation-freightbrokerage.com/uploads/1/3/0/3/130313529/67d0fb13fd8.pdfIn PDF document text
    • http://ablesonslabradoodles.com/uploads/1/3/0/4/130483990/2caa1.pdfIn PDF document text
    • http://pastking3.ru/uploads/2020/01/27/126040.pdfIn PDF document text
    • http://no1comedyclub.com/uploads/1/3/0/5/130590467/piranep.pdfIn PDF document text
    • http://reliablelawnms.com/uploads/1/3/0/6/130620982/diziwilej.pdfIn PDF document text
    • http://miami.momotombochocolatefactory.com/uploads/1/3/0/6/130604710/130604710.html#how+to+copy+archive+folder+in+outlook+2007In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000016c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C8 8304 bytes
SHA-256: f45ba1858da07cd9f38108ffa62b61542db273beb9402afba529aabed4172a71