Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9b3f111579f199…

MALICIOUS

PDF

84.8 KB Authoring application: LibreOffice Draw First seen: 2020-09-07
MD5: 8cce0a8b63c3c8714177b959bc36db06 SHA-1: 29c9ef700acd26e2415d5bf152cbb8b107aa849f SHA-256: ff9b3f111579f1991dbcdeadb10bd17f07f0034909af7c667c9644be3093eec2
172 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDFs, a technique often used for SEO poisoning or to distribute malicious content. The heuristic 'SE_CALLBACK_LURE' indicates the document prompts the user to call a phone number in a context related to billing or security, suggesting a callback phishing or tech-support scam. The embedded URLs likely lead to further stages of the attack, such as downloading additional malware or redirecting to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://gobrdx.com/uploads/1/3/0/4/130476912/mobibem.pdf In PDF document text
    • http://snsmedia.org/uploads/1/3/0/6/130621946/f5087a2c.pdfIn PDF document text
    • http://mnlifecoach.com/uploads/1/3/0/4/130436139/3ec4c4.pdfIn PDF document text
    • http://thescentedsheep.com/uploads/1/3/0/4/130488316/248968.pdfIn PDF document text
    • http://neokundalini.org/uploads/1/3/0/7/130739661/130739661.html#blockhouse+sheet+anchorIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092 10400 bytes
SHA-256: 6231c1d72ffbe26a9f0fa926eb21bf3ddbb3e741c3439f61b8dc207a2ab205ee
font_01_sfnt_off000092e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92E4 6728 bytes
SHA-256: 5278024270de67705d3a5034a26ce2f5e1d9e53f50705cc770b2190155f81e7b
font_02_sfnt_off0000a350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA350 18044 bytes
SHA-256: e8121f68367e534d579b384d9bcd492b59556769679699226caa26b053eb2cc2
font_03_sfnt_off0000be2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE2B 36456 bytes
SHA-256: c0dccef5d5fff9ca48795819e975c144d14411f56e7fee9a34c53944d5b03b9f

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