Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e45a9aa417b1dc…

MALICIOUS

PDF

51.5 KB Authoring application: Poppler-utils
MD5: 20b2a9535e4251631154c7cbac385cbb SHA-1: 146fdb8c09f80b1de2d3c4e1d1c8cd835d39612b SHA-256: 23e45a9aa417b1dcc0fb3012bbc29d32a638ffca1119358aecf6ea9dfba3cff5
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, designed to redirect users to malicious PDF files. The document body masquerades as a free download for a "Saxophone for dummies" PDF, a common lure for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://charlie-myers.com/uploads/1/3/0/5/130589159/7e651b7bf4864.pdf
    • http://biodanzacuerpoyalma.com/uploads/1/3/0/7/130740252/pixezegekinilonodosu.pdf
    • http://instagram-support-account.com/uploads/2020/01/28/vemebiwefip_tevazipeg_fatodu_vuzaxesogegov.pdf
    • http://verticesglobals.com/uploads/1/3/0/5/130544352/97041ba87eb3.pdf
    • http://roomtodream.net/uploads/1/3/0/6/130621771/6923482.pdf
    • http://mrhillchemistry.co.uk/uploads/1/3/0/6/130620712/kejapeguroma.pdf
    • http://nanny101.net/uploads/1/3/0/4/130483397/xugazedepajasoz.pdf
    • http://spedtechteacher.com/uploads/1/3/0/6/130639928/nukoxojenudu.pdf
    • http://u-ehs.com/uploads/1/3/0/6/130621826/130621826.html#saxophone+for+dummies+pdf+free+download

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000123f.bin
afccbe08763666a9034f5fff73891288e82eb17f30644bb89b304863245d6d40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123F 9872 bytes
font_01_sfnt_off0000806c.bin
062abeeb0630068c9ebda4cd69880ba7d22c023ef851e82e77d1a768bfa0705b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x806C 17648 bytes

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