Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc696a195a167e9d…

MALICIOUS

PDF

51.9 KB Created: 2020-06-19 23:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37b976f18a09d597d1fa530618aa178d SHA-1: 82e99f517e55e6b91599c3a17cb7164c75a60338 SHA-256: bc696a195a167e9d30cabff615ec31f55349f0617f71b9af43310f199a03d770
94 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO poisoning and distributing malicious content. The document body, though obfuscated, references 'Spelling activity worksheet generator' and includes a URL that aligns with this lure. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm, suggesting the primary goal is to redirect users to potentially harmful websites.

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://maximoapex.net/uploads/1/3/2/7/132710736/132710736.html#spelling+activity+worksheet+generator
    • http://krogurt.com/uploads/1/3/0/5/130590296/5e5889272b2c.pdf
    • http://littlepeoplescloset.com/uploads/1/3/0/5/130547812/344014268ce38c4.pdf
    • http://triquetraphoenix.com/uploads/1/3/0/5/130590663/7276664.pdf
    • http://s-and-j-artworks.com/uploads/1/3/0/6/130639782/worutezijenajup.pdf
    • http://hardbodyathletics.org/uploads/1/3/0/5/130545098/dirujuv.pdf
    • http://coincomptable.com/uploads/1/3/0/4/130436136/c3ed605e457ed.pdf
    • http://suspensionbridge.org/uploads/1/3/0/4/130490584/kuvejometabix.pdf
    • http://papavingpros.com/uploads/1/3/1/6/131606113/sokapofuj_lijaxala_molujaworizodi.pdf
    • http://admin.hwupenyuproject.org/uploads/1/3/0/6/130639784/paxapuselipegi.pdf
    • http://phenomenalprotectivesecurityservices.com/uploads/1/3/0/3/130313619/37a26947d675.pdf
    • http://hardbodyathletics.org/up
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ced.bin
5a1c3140df61888e99f4e961a33475c45652c8b1a3997fad727e8668d61a3192		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CED 5404 bytes
font_01_sfnt_off00009f57.bin
139421793193322e47ecc628bae6d7133c24ea7d80c1833982f87297abb87845		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F57 10436 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.