Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e126c9f7ae08d3d…

MALICIOUS

PDF

41.7 KB Created: 2020-06-12 10:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6724cb0f40e3c1bd0ff91bbd3f187815 SHA-1: 26a9026db0fb6f8fa726f8f4d1c3920e7bedf0bb SHA-256: 7e126c9f7ae08d3d8ad14231c98715094549d06808497dd49e6b86da918ba05b
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, pointing to various domains. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests an attempt to redirect users to potentially harmful content or phishing sites. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://chippysangelstotherescue.org/uploads/1/3/1/3/131381680/131381680.html#golden+west+tv+guide
    • http://brickartist.shop/uploads/1/3/0/3/130313316/kivesutab_tikoxemub_luwudetiz.pdf
    • http://fredslondon.co.uk/uploads/1/3/1/8/131856176/9438931.pdf
    • http://yearbookgmcc.com/uploads/1/3/1/8/131856622/1107474.pdf
    • http://dmtraining.net/uploads/1/3/0/7/130739180/854623.pdf
    • http://cpanel.linlithgowscdc.org/uploads/1/3/0/2/130289235/2b8e4c12aacd9d.pdf
    • http://verboonbv.com/uploads/1/3/0/2/130272963/wifevawesakowa-bizipekelofin-xitofasires.pdf
    • http://stpetronas.co.uk/uploads/1/3/0/8/130873737/7585405.pdf
    • http://benzhost.com/uploads/1/3/0/4/130488955/74843677d1.pdf
    • http://boltsoccerandfitness.com/uploads/1/3/1/8/131859613/7428012.pdf
    • http://toogreedytolive.com/uploads/1/3/1/4/131452935/8220562.pdf
    • http://cassiusmaintenance.com/uploads/1/3/1/3/131380894/8508412.pdf
    • http://1pn.undesirable.us/uploads/1/3/0/5/130542692/6432280.pdf
    • http://old.xltally.in/uploads/1/3/0/2/130289002/4678727.pdf
    • http://chateauneufdupapewineclub.net/uploads/1/3/0/2/130288579/zobuwabilonebi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fonosusuba.files.wordpress.com/2020/06/tovun.pdf
    • https://tujirunovu.files.wordpress.com/2020/06/26768392120.pdf
    • https://rewudiref.files.wordpress.com/2020/06/72424234598.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007726.bin
018f66f62eaf9054c63c709f064bea0ffb684c01727c5314974b32dafb431512		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7726 10636 bytes

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