Malicious PDF — malware analysis report

Static analysis result for SHA-256 231a967e3508712a…

MALICIOUS

PDF

45.0 KB Authoring application: Smallpdf Desktop First seen: 2021-01-11
MD5: 72b521354b092e83c07f21a9e896c54a SHA-1: 62a9acb65e7d6ca62cb7f3988ff0e52bb2cc33e5 SHA-256: 231a967e3508712aec0277279659ead92d09aa4262b279377c2840b86670186b
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://nzbriards.com/uploads/1/3/0/2/130274338/55d5b4baaefd5d1.pdf In PDF document text
    • http://knightsdebate.com/uploads/1/3/0/6/130621063/1008414.pdfIn PDF document text
    • http://dnmlr.com/uploads/1/3/0/5/130590779/puxarewikeditej.pdfIn PDF document text
    • http://coratoloassociatesllc.com/uploads/1/3/0/4/130483303/82cebc4.pdfIn PDF document text
    • http://beyondjordanarise.com/uploads/1/3/0/3/130313186/ruregufixenakug-piwelalis-walodal.pdfIn PDF document text
    • http://arctictreasures.shop/uploads/1/3/0/3/130323659/lulowexe.pdfIn PDF document text
    • http://midiowaworkingdog.com/uploads/1/3/0/7/130739533/gufasiko.pdfIn PDF document text
    • https://kuvetuzorax.weebly.com/uploads/1/3/0/2/130270912/sulefozujudisolewe.pdfIn PDF document text
    • http://northshoreconstructionchriskanter.com/uploads/1/3/0/3/130379299/xotewi_verawog_govumozaxakeka.pdfIn PDF document text
    • http://behinddaytona.com/uploads/1/3/0/5/130540453/130540453.html#diablo+3+set+me+freeIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5 9992 bytes
SHA-256: 55ac9c8c4ebe751cf2d5d52e52d83a042c5574c0723e8824408703cebd7daee1
font_01_sfnt_off0000699c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x699C 16068 bytes
SHA-256: 6db2f878e0fd57d3a351d0d81a5ccd7b58f68df6728dadc3aee3ebeb1a1d6e60

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