Malicious PDF — malware analysis report

Static analysis result for SHA-256 730599ead67e573c…

MALICIOUS

PDF

49.4 KB Authoring application: Inkscape
MD5: d12ea8be875e1a5106409ef0baff3139 SHA-1: 191d3dd20246957ebd3645b98ada6b49b0f95909 SHA-256: 730599ead67e573c416a3261f223e79bb6ba063141d1b8e3b35fd7093fbe5afb
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, with ClamAV specifically identifying it as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The document body, though heavily obfuscated, appears to be a lure related to 'life cycle of entamoeba histolytica images', suggesting a deceptive pretext for the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://74-123-78-51.mgwnet.com/uploads/1/3/0/2/130273944/335e9b908b.pdf
    • http://pulsewx.com/uploads/1/3/0/5/130589245/4193326.pdf
    • http://carpetcleaningwinston.com/uploads/1/3/0/8/130873989/kobini.pdf
    • http://johnsteinman.net/uploads/1/3/0/7/130775380/juvowutif.pdf
    • http://champastreet.com/uploads/1/3/0/8/130814469/ganib_fakarusomuvas_ravej_diron.pdf
    • http://hollybabiarz.com/uploads/1/3/0/8/130814457/padujibob-gujomapixenej-zivava-lapajokifiw.pdf
    • http://thedimecincy.com/uploads/1/3/0/5/130588605/c798a93.pdf
    • http://mta-sts.funeralalfa.com/uploads/1/3/0/6/130621407/lazad-jowojepevi-tunudizojite-lukuvesum.pdf
    • http://stmargaretbiglake.com/uploads/1/3/0/5/130539659/4775658.pdf
    • http://preapprovalcredit.com/uploads/1/3/0/5/130588438/zigenokubo-niwogumuvuzi.pdf
    • http://negativespace3d.com/uploads/1/3/0/3/130313729/130313729.html#life+cycle+of+entamoeba+histolytica+images

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a7e.bin
e156f4d3a733e74518702ba9323d771df89f98b9351fb3357571e921fe926908		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7E 8888 bytes

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