Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2266a7f8cd330c…

MALICIOUS

PDF

41.8 KB Authoring application: Serif PagePlus
MD5: b92f777639d5810f80adb886ecaa3d8b SHA-1: 434f5998d0746a7f1a9880ce112f76861ae59423 SHA-256: ea2266a7f8cd330c01288be7049a97395fd34b6c9fe67cd02ebbc194dbfd0069
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 manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are the primary indicators of compromise.

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://childrensliteratureandreading.org/uploads/1/3/0/4/130489351/1940520.pdf
    • http://artistsviewnh.weebly.com/uploads/1/3/0/2/130291365/lexosin-donaz-lubupisozekod-delitagu.pdf
    • http://ndlobmac.com/uploads/1/3/0/6/130620314/abfe98461.pdf
    • http://aardemalab.weebly.com/uploads/1/3/0/5/130590393/vasitof_jumox_puwiti.pdf
    • http://myriuwedding.com/uploads/1/3/0/4/130475981/guxitogusid.pdf
    • http://splitfingerstudio.com/uploads/1/3/0/4/130483385/menajemo.pdf
    • http://maccheese.net/uploads/1/3/0/6/130605351/0684d.pdf
    • http://spedtechteacher.com/uploads/1/3/0/6/130639664/8575308.pdf
    • http://monaco-trade.com/uploads/1/3/0/3/130313577/xumibiseb-tikiveruwiluku-ranujazel.pdf
    • http://slimhade.info/uploads/2020/01/27/8d1333f.pdf
    • http://brooklyncollegemfashowcase.com/uploads/1/3/0/3/130324065/3f4d640be6a.pdf
    • http://ka-bloomgroup.com/uploads/1/3/0/5/130547812/b1928149750.pdf
    • http://nicolitulk.com.au/uploads/1/3/0/6/130640235/130640235.html#panda+bear+worksheets+for+preschoolers

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001368.bin
f4652650c9fbc8a57bda136576fa9d7a6774961ae33ae19554fbcfe5e81f14a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1368 8520 bytes
font_01_sfnt_off00005ce3.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE3 16036 bytes

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