Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a652338a1687a92…

MALICIOUS

PDF

38.2 KB Authoring application: Pdftk
MD5: d3cd263b9b5935f9bdae8b4c0c831d93 SHA-1: 485f0af1ad4002ee33b1bf3b5a23a2bb6d70329c SHA-256: 1a652338a1687a92a5e535e6258aea82b9bae9c3d575555efa7ec3308604596e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, a technique commonly used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs point to domains that appear to be part of a link farm, suggesting a phishing or content distribution scheme.

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://lordoftheblock.com/uploads/1/3/0/5/130546645/gusirukaxi-muriv-gunuloxev-wojefo.pdf
    • http://varietycornerhangout.com/uploads/1/3/0/6/130621194/mivewopokakodopituxe.pdf
    • http://veteransmusicfest.com/uploads/1/3/0/4/130477228/875833.pdf
    • http://soulempower.com/uploads/1/3/0/2/130272372/jazibozasumig_lokiji.pdf
    • http://jamesorourkelaw.com/uploads/1/3/0/2/130272284/99e5c5.pdf
    • http://mygrillisland.com/uploads/1/3/0/6/130620840/176f7e.pdf
    • http://www.thelittlethingsbykate.com/uploads/1/3/0/6/130620719/7223693.pdf
    • http://nataliemangalindandesign.com/uploads/1/3/0/6/130604803/pavujovelubobakej.pdf
    • http://williamsonautomotive.ca/uploads/1/3/0/5/130590367/d1c23045e42183d.pdf
    • http://www.create-a-tree.com/uploads/1/3/0/3/130323997/99231.pdf
    • http://smithwellbeing.com/uploads/1/3/0/6/130620912/jubosininojesofo.pdf
    • http://74-123-72-107.mgwnet.com/uploads/1/3/0/2/130289613/130289613.html#gina+guidelines+for+bronchial+asthma

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000025f3.bin
e1732afad814c741dd98b6db6bc7a41bee7146efcf81fc7fd6ccabd2c9be947e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25F3 16036 bytes
font_01_sfnt_off00003d3a.bin
5792c9ca53b6a32bdfc5bb7fcd818e9186265190ce8edebb05c993e73467c1b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3D3A 8380 bytes

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