Malicious PDF — malware analysis report

Static analysis result for SHA-256 b23f097c2988272a…

MALICIOUS

PDF

62.0 KB Authoring application: LibreOffice Draw First seen: 2020-09-07
MD5: d95a0c98c5ab061ba8609ba4d047cbbf SHA-1: 879d4a68718d47deb620397047157b671b59d3c3 SHA-256: b23f097c2988272a58265d75056d3446448c9cdd60ef651668ea31120cdef20c
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded URLs pointing to external websites, indicative of a link farm. The heuristic 'PDF_SEO_LINK_FARM' confirms this, identifying 24 generated SEO PDF links. Additionally, the 'SE_LOLBIN_RUN_COMMAND' heuristic suggests the document may contain instructions for executing commands, potentially to further facilitate malicious activity. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' strongly supports a phishing or malicious redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://fatdotmedia.com/uploads/1/3/0/6/130621219/tobeberifobigurogu.pdf In PDF document text
    • http://spccmd.com/uploads/1/3/0/3/130379311/0caa6b.pdfIn PDF document text
    • http://arcsurgery.org/uploads/1/3/0/5/130589085/pokedifunu.pdfIn PDF document text
    • http://takadiwowo.wisdom-olga.ru/uploads/2020/01/28/detagotiwivevimiv.pdfIn macro / runtime command snippet
    • http://cranemoon.com/uploads/1/3/0/4/130476493/50c03.pdfIn PDF document text
    • http://asharperimage.ca/uploads/1/3/0/4/130483146/4264109.pdfIn PDF document text
    • http://nadzorybudowlane-arles.pl/uploads/1/3/0/6/130604467/feboxatojetelodu.pdfIn PDF document text
    • http://mosharafraju.weebly.com/uploads/1/3/0/3/130323409/ffef463b.pdfIn PDF document text
    • http://michelamclaurin.com/uploads/1/3/0/4/130435600/a94e13ebf5e2.pdfIn PDF document text
    • http://notsowired.info/uploads/1/3/0/5/130539403/xixipezu_sugikuw_gemelifomazito.pdfIn PDF document text
    • http://realedchat.com/uploads/1/3/0/6/130639889/0483ba2e0f.pdfIn PDF document text
    • http://southernangelboutique.net/uploads/1/3/0/3/130313488/bowib.pdfIn PDF document text
    • http://theelfbox.com/uploads/1/3/0/8/130874639/130874639.html#acoustic+impedance+measurement+part+i+a+reviewIn PDF document text
    • http://arcsurgeIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1 9292 bytes
SHA-256: 67b8b13a04d5560fd007303eb01ecda308b43134c27a8b4b55e26bd629ead225
font_01_sfnt_off0000a18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA18B 16112 bytes
SHA-256: e5ccfd3f99ebc43cdff36d9dbb23b893a35b61ae846029f319c9c4559a202207
font_02_sfnt_off0000b62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB62D 3388 bytes
SHA-256: ed1809bfb23239bea0b63405b1e51db4c86b8440fd9c678046e020a4fd4e6815

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