Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca8b6f1c4d6a3c5a…

MALICIOUS

PDF

44.6 KB Authoring application: OpenOffice.org
MD5: f6eace2c866bc0134ab6b8a23470d66b SHA-1: d2637850974dcd428ec66225403b3fa6bb6ebb47 SHA-256: ca8b6f1c4d6a3c5aed5e502b1117fcee9904907529c5deaa29c936d3a0d6fe42
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be related to 'Advantages of biofuels from algae', likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://angelhomebiz.info/uploads/1/3/0/5/130550724/xawigunigiwufe_dozezoxox_japuw_sudunapibeb.pdf
    • http://archisdesign.net/uploads/1/3/0/2/130287972/jopamufajom.pdf
    • http://www.bbv-asbeco.de/uploads/1/3/0/6/130621051/molul.pdf
    • http://findhaunts.net/uploads/1/3/0/6/130621458/094ad605.pdf
    • http://timetravelersretrorevival.com/uploads/1/3/0/9/130969726/5294895.pdf
    • http://strangebrau.com/uploads/1/3/0/7/130739766/mibubaludit-kovoxogu-nemibufinabu.pdf
    • http://www.merrystreet.com/uploads/1/3/0/4/130436513/nelalodebizobe_kezozadisirage_kadusolir.pdf
    • http://hostmaster.sarahbutcher.com/uploads/1/3/0/2/130289225/6365579.pdf
    • http://squadronheadquarters.com/uploads/1/3/0/6/130621485/zujisesibasenubab.pdf
    • http://oakleykambel.com/uploads/1/3/0/6/130604193/turorugapukawesewa.pdf
    • http://psychotherapeute-paris.net/uploads/1/3/0/5/130542769/rolubaro.pdf
    • http://charlottetrolley.org/uploads/1/3/0/7/130740517/puvowelo_jenojabobu.pdf
    • http://maleskincareblog.com/uploads/1/3/0/4/130435556/6623926.pdf
    • http://the-500-bling-barn.com/uploads/1/3/0/6/130604821/9723129.pdf
    • http://beginningphpandmysql.com/uploads/1/3/0/7/130740077/xufosasudoxibu.pdf
    • http://61005.brdge.org/uploads/1/3/0/7/130775850/130775850.html#advantages+of+biofuels+from+algae

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003d3f.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3D3F 16036 bytes
font_01_sfnt_off00005443.bin
825f172daf444752c330518d0225e1e692ff63074501c3d102594d0a28c109cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5443 7744 bytes

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