Malicious PDF — malware analysis report

Static analysis result for SHA-256 1477b26cb8c6e4f1…

MALICIOUS

PDF

38.3 KB Authoring application: Nitro PDF
MD5: 350ef1840f7dd85d1e6e1f80468254d2 SHA-1: a52f0c66e88c2b952919e9a35f0f28930817f0ae SHA-256: 1477b26cb8c6e4f188b9e1de1572a4a182bbcfec9a037c761c1e4200d3c8124a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as phishing or traffic redirection. The document body, though containing garbled text, also includes many of the same URLs, reinforcing the finding that the primary purpose is to direct users to external resources.

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 https://ranoxavuje.weebly.com/uploads/1/3/0/4/130492963/0e093a474b.pdf
    • http://cgt-capgemini-ts.net/uploads/2020/01/29/1096535.pdf
    • http://tewutef.lead2rose.com/uploads/2020/01/28/lotegaditud.pdf
    • http://asesoriatravelsandworks.com/uploads/1/3/0/4/130483582/palavumasewebu_mofeli_murizewali_zusipod.pdf
    • http://audicionamericas.com/uploads/1/3/0/2/130271124/nufilesezejitaza.pdf
    • http://social-promotion.ru/uploads/2020/01/29/f468f58.pdf
    • http://michelejoyjewelry.com/uploads/1/3/0/4/130483096/2479372.pdf
    • http://morganhomesliving.com/uploads/1/3/0/5/130540097/vinina.pdf
    • http://modestomasonry.com/uploads/1/3/0/5/130543874/kufaduf.pdf
    • http://votepedrini.com/uploads/1/3/0/3/130379921/tubum.pdf
    • http://plf16app.com/uploads/1/3/0/5/130550742/5896968.pdf
    • http://kipoxepe.car-tier.com/uploads/2020/01/27/1152258.pdf
    • http://fabukunifu.kusatori.info/uploads/2020/01/27/342712.pdf
    • http://shampoochesbt.com/uploads/1/3/0/5/130543198/ed47be.pdf
    • http://chippewafsc.com/uploads/1/3/0/2/130288341/9595073.pdf
    • http://rubar.myalbumsexy.com/uploads/2020/01/28/lekibeginelej_noxononupe_rolanume.pdf
    • http://coastalchurchmaine.com/uploads/1/3/0/6/130620579/dazusewejosume-vugelanonizo-xukumozerineg-nuwoko.pdf
    • http://miracleinabucket.com/uploads/1/3/0/5/130589104/130589104.html#grievous+bodily+harm+with+intent+sentencing+guidelines

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014c2.bin
f40cfd219f4c66dc870fcf728e3104bd96e2395d042cd792d7308585ab80a106		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C2 7636 bytes

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