Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25bdf3e0a89a755…

MALICIOUS

PDF

45.2 KB Created: 2020-04-02 05:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c4442b46ef0471d7b723591d2f537e96 SHA-1: b3b6e84db568eece18dceaa9c016c59cba4912b1 SHA-256: d25bdf3e0a89a75565680986e5424283be9de3cacd2cc3fa95b90f8be3b5d8f8
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, pointing to various domains. The ML classifier strongly indicates maliciousness. The document body text is largely obfuscated but contains references to the URLs, suggesting a lure to external content. The primary attack pattern involves redirecting users to a multitude of potentially malicious or spam-related websites.

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://peabsnc.com/uploads/1/3/0/7/130775528/130775528.html#ejemplos+de+aparatos+y+sistemas+biologia
    • http://dantearthurs.com/uploads/1/3/0/7/130776061/zarefenunu_zonijasunij_dafubupefokusa_babibepanite.pdf
    • http://designisdesign.net/uploads/1/3/0/9/130969561/wolamomononaxakugaz.pdf
    • http://imperialservicos.com/uploads/1/3/0/5/130589239/7e8f34.pdf
    • http://deadrabbitbikes.com/uploads/1/3/1/1/131163733/d2cb3d1eca87c10.pdf
    • http://lakecreekcollections.com/uploads/1/3/0/7/130738534/ee9550.pdf
    • http://sponsorshipcollective.ca/uploads/1/3/0/5/130590105/0550f4c4db0918c.pdf
    • http://championmusictech.org/uploads/1/3/1/0/131070389/kofibase.pdf
    • http://cogswell.info/uploads/1/3/0/7/130775098/kuxuzipowolaze.pdf
    • http://smartspeechny.com/uploads/1/3/0/6/130621002/3611617.pdf
    • http://kmsaudio.com/uploads/1/3/0/5/130539691/eeacad.pdf
    • http://viningssquare.com/uploads/1/3/0/5/130551144/2b167e.pdf
    • http://keepdivealive.com/uploads/1/3/0/8/130813033/tipuzomuza.pdf
    • http://riverviewbookkeeping.org/uploads/1/3/0/3/130313358/merojepisobi.pdf
    • http://galesfurniture.com/uploads/1/3/0/7/130776069/d8ac9dd0af5.pdf
    • http://ruggusco.com/uploads/1/3/0/6/130621060/zunenepaduvud.pdf
    • http://thebestabodes.com/uploads/1/3/0/7/130740212/vojipevipenis_vujevolup.pdf
    • http://ftp.1201third.com/uploads/1/3/0/7/130775912/bazuvotalejefemur.pdf
    • http://thevivaciouslivingcompany.com/uploads/1/3/0/5/130588675/tezagurevebov-kotokut-zaxovun-figob.pdf
    • http://learnchemapp.com/uploads/1/3/0/5/130543064/3b6f2edfd076.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_off000088b5.bin
20d65952db39a2fcce8ae8433def4bd27430049a4f18829851c02fc2e0093672		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88B5 7940 bytes

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