Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e240ab120be23d…

MALICIOUS

PDF

50.5 KB Authoring application: pdf-parser First seen: 2020-09-24
MD5: c4b9ec58155b85dc73526a1bc13ac10e SHA-1: 6aa88da5dc9d608ef460a80666e2bca4255d371e SHA-256: 76e240ab120be23d41dbd8d25169013aad0917edd3691dbc8a50a7bb2b45ce47
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links disguised as legitimate content, a technique often used for SEO poisoning or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to distributing further malware or phishing content. The embedded URLs are the primary indicators of compromise, suggesting a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://nwcbuildingservices.com/uploads/1/3/0/2/130271167/setez.pdf In PDF document text
    • http://laughingduck.org/uploads/1/3/0/7/130776885/rasot.pdfIn PDF document text
    • http://office-supp.com/uploads/1/3/0/5/130588712/2388149.pdfIn PDF document text
    • http://comfycabinfamily.com/uploads/1/3/0/3/130312983/2f3d5f7124c13e7.pdfIn PDF document text
    • http://shrewsburycondo.com/uploads/1/3/0/2/130292173/zibutifadelo.pdfIn PDF document text
    • http://nickyarthur.com.au/uploads/1/3/0/4/130435503/3747757.pdfIn PDF document text
    • http://lloydstreeter.com/uploads/1/3/0/7/130739886/8721778.pdfIn PDF document text
    • http://waylessepoxyflooring.com/uploads/1/3/0/5/130589219/060a849f.pdfIn PDF document text
    • http://mybiohelp.com/uploads/1/3/0/6/130620173/3422200.pdfIn PDF document text
    • http://beyondhillco.com/uploads/1/3/0/4/130476203/130476203.html#download+surah+yaseen+pdf+in+englishIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3 8360 bytes
SHA-256: daac483b14a046788b989011a76e3b7fea2840bffc61674584230bcc5ee2c3a7
font_01_sfnt_off00007fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE8 16028 bytes
SHA-256: ca889182d22413b1a5b6446cd5d954c095bfc2c8b2fec1022b19199100617195

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