Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7941af09822eb59…

MALICIOUS

PDF

43.4 KB Authoring application: Poppler-utils First seen: 2020-12-25
MD5: 7189396f0462ceaf2abfd3d325506b3e SHA-1: aea603a02a5ebafbef9121e5e5259d8873f4c085 SHA-256: b7941af09822eb597c744639c9190e309980dd576bdde88465bc5a72c9cc95d3
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, indicating a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the sheer volume of external links is highly suspicious.

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://aviationcleanair.weebly.com/uploads/1/3/0/6/130639467/piwegorafupiwi_lajiwo.pdf In PDF document text
    • http://rerokeki.hallo-mensen.com/uploads/2020/01/28/2803421.pdfIn PDF document text
    • http://notalright.org/uploads/1/3/0/5/130589360/befatunase.pdfIn PDF document text
    • http://lordpulex.com/uploads/1/3/0/3/130323996/pejekewufakos-zidatatemiduga-jijavalun-lukalugufez.pdfIn PDF document text
    • http://divineemergence.com.au/uploads/1/3/0/6/130620687/tedamapapavuxu.pdfIn PDF document text
    • http://jamesorourkelaw.com/uploads/1/3/0/2/130289346/55d7d7cc646.pdfIn PDF document text
    • http://lyle-sightings.com/uploads/1/3/0/5/130590159/2782625.pdfIn PDF document text
    • http://sadipuse.downloadappios.com/uploads/2020/01/28/nezomelom_zojezen_jigojexujeze.pdfIn PDF document text
    • http://geposorogu.spb-shocker.ru/uploads/2020/01/28/neselijogukoludafaju.pdfIn PDF document text
    • http://mystrugglemyvictory.com/uploads/1/3/0/4/130483871/3635948.pdfIn PDF document text
    • http://ninjadiveteam.com/uploads/1/3/0/2/130288511/983b72c8787c8c5.pdfIn PDF document text
    • http://moodlabnewlife.nl/uploads/1/3/0/6/130639922/130639922.html#livro+dos+prazeres+clarice+lispectorIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9 10152 bytes
SHA-256: 11ba82aaf3b3c71d2464f6598cfd245a909e2a8d9a09c95a95be6de58f0d6825
font_01_sfnt_off000062b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B5 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d

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