Malicious PDF — malware analysis report

Static analysis result for SHA-256 77010c5c84ccaf85…

MALICIOUS

PDF

36.3 KB Authoring application: Adobe PDF Library 9.0
MD5: 8e7128d8dd88ec5f29c1420afb7a4975 SHA-1: 564a6529bad3fab9b04fbb2226b3c0d9c1bcfe94 SHA-256: 77010c5c84ccaf85eefcd24c32c16149b39b244be9bad24f94d74955004498d4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, identified as a PDF SEO link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the presence of numerous URLs suggests an attempt to redirect users to malicious sites or to manipulate search engine results.

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://bukudata.com/uploads/1/3/0/7/130739578/5453345.pdf
    • http://nakedroots1.com/uploads/1/3/0/8/130814063/mipujedasep_xutodixag.pdf
    • http://oakhillcontractorsllc.net/uploads/1/3/0/8/130814200/tigonazakebu.pdf
    • http://movingbackdrops.com/uploads/1/3/0/5/130590257/6954768.pdf
    • http://purelifealliance.com/uploads/1/3/0/6/130620467/ribigagerifuvudo.pdf
    • http://priscilajamison.com/uploads/1/3/0/6/130620317/1179520.pdf
    • http://www.staplesmillgarage.com/uploads/1/3/0/8/130814902/87209.pdf
    • http://workplaemassagetherapy.com/uploads/1/3/0/7/130775386/worova.pdf
    • http://beckervetclinic.com/uploads/1/3/0/6/130639408/975466d7f3b.pdf
    • http://treinasoft.net/uploads/1/3/0/7/130738863/785035.pdf
    • http://www.shirts2atee.com/uploads/1/3/0/5/130588846/442723230aa7.pdf
    • http://msatpartners.com/uploads/1/3/0/5/130539185/tiside.pdf
    • http://picpal.org/uploads/1/3/0/6/130639230/tepetirubul.pdf
    • http://otf.brdge.org/uploads/1/3/0/6/130620846/130620846.html#grade+3+calf+muscle+tear+recovery+time

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000036cf.bin
8ed240832419221d4e9db4fac05a6edbbe13955b7fdd561ab36584af9515c8b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x36CF 7360 bytes

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