Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5a69ae77b502f3…

MALICIOUS

PDF

33.2 KB Created: 2020-03-22 06:29:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 01f412d1d577d67bc637e1c75c2432cc SHA-1: e7d0dfd3a38db73fc558578e2ea123d455d1fe9d SHA-256: eb5a69ae77b502f3377b53a0ad9e4e66f0d5cb199fb306a5bdf46b9010743b92
92 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier as malicious. It contains numerous external links, many of which point to PDFs hosted on unrelated domains, suggesting a link farm or SEO poisoning tactic. One of the embedded URIs, 'http://clickinteriordesign.net/uploads/1/3/0/5/130551338/130551338.html#scholastic+news+edition+4+january+27+2020', appears to be a lure, potentially leading to a phishing page or further malware. No scripts were extracted, but the structure and numerous external links indicate a malicious intent to redirect users.

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://clickinteriordesign.net/uploads/1/3/0/5/130551338/130551338.html#scholastic+news+edition+4+january+27+2020
    • http://gonzosautotronicdiagnosticcenter.org/uploads/1/3/0/4/130488754/zolagagedov-sanor.pdf
    • http://www.vbhandsonmuseum.com/uploads/1/3/0/8/130813953/pogawini.pdf
    • http://andrewandsons.org/uploads/1/3/0/3/130379219/d6f03c1b393a.pdf
    • http://skywarnforum.com/uploads/1/3/0/2/130291996/redidaveritudoj.pdf
    • http://claytoncollierbrown.com/uploads/1/3/0/7/130738507/2855317.pdf
    • http://leranet.com/uploads/1/3/0/6/130621110/zizeminore_wolavoligi.pdf
    • http://uberrestore.com/uploads/1/3/0/7/130739503/a3428.pdf
    • http://www.junipergrovepuppies.com/uploads/1/3/0/5/130550714/840669.pdf
    • http://thebestaddress.org/uploads/1/3/0/6/130604161/540e230dd.pdf
    • http://www.studio1999.shop/uploads/1/3/0/6/130622116/549e467a763b.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058f2.bin
e446de3b168a23b10f0487326ab2ce21e510d397711f2877ae91e4b5e02a3cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F2 7912 bytes

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