Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c462b3ea7d993d8…

MALICIOUS

PDF

47.0 KB Authoring application: PDFBox
MD5: 2e27f1fc10d922dbb7cfcb9b5cf97c5b SHA-1: a167c5dd4b1a01fb5c3ece76c5166ac3b7baed11 SHA-256: 8c462b3ea7d993d8ec3e8b3e5eeecfaf1ab9b627d1d66c30402c9c4c7ee36031
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or distributing malicious content. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically related to phishing and traffic redirection. The document body, though partially corrupted, mentions music production equipment, likely a lure to disguise the malicious intent of redirecting users to a network of suspicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://sidebysidesd.org/uploads/1/3/0/6/130639831/b949307cf182.pdf
    • http://byzantinegreek.com/uploads/1/3/0/5/130588678/49ad82a6150c9.pdf
    • http://hitandmisshomesteader.com/uploads/1/3/0/7/130775679/detapoxu-bolimudilu-sasakep.pdf
    • http://trustedcannabiscfo.com/uploads/1/3/0/5/130588654/0165885954f4.pdf
    • http://interact6380.org/uploads/1/3/0/4/130476513/zuraxivananov.pdf
    • http://www.hmtranslations.com/uploads/1/3/0/6/130621677/53e1d47.pdf
    • http://develleoper.com/uploads/1/3/0/8/130873798/gajitojedalogup.pdf
    • http://nvclassical.com/uploads/1/3/0/7/130775440/sivowepifogiruza.pdf
    • http://mxe.alldogobedience.com/uploads/1/3/0/9/130968917/rejamiximebagemotaw.pdf
    • http://arcadiagardenslandscape.com/uploads/1/3/0/5/130590618/e16c770ac1416.pdf
    • http://theovercomersblueprint.com/uploads/1/3/0/6/130604324/130604324.html#how+to+work+an+akai+mpk+mini

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049f7.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49F7 16036 bytes
font_01_sfnt_off00006153.bin
4709d449fde896383750671846d79150f7bf387335f9bc7af6e981c791c6ce9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6153 8208 bytes

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