Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c5487da1fdb634…

MALICIOUS

PDF

43.9 KB Created: 2020-03-21 14:50:23 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a07342d095d8853852639427af347f7f SHA-1: bd47c6a3eac63c35ee08e5e200d4ed5a32ba631e SHA-256: 44c5487da1fdb634c1beb005727995ac8b0b1513f56591c40beb6b433fefb8c2
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be generated for SEO purposes. The ML classifier strongly indicates maliciousness. The primary attack pattern involves directing users to external resources, likely for further exploitation or to host malicious content. No scripts were extracted, limiting the ability to determine specific payload delivery mechanisms.

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://angela-swanson.com/uploads/1/3/0/6/130604519/130604519.html#dissolved+oxygen+and+aquatic+primary+productivity+lab
    • http://webmail.humanconnectionsniagara.com/uploads/1/3/0/2/130289803/wegimakotebalo.pdf
    • http://openstemlabs.com/uploads/1/3/0/7/130775247/gevewadasukufupaz.pdf
    • http://emmarash.ronrash.com/uploads/1/3/0/6/130621200/rirazoj.pdf
    • http://misspaulayoga.net/uploads/1/3/0/7/130738892/debovifif-gejabugagipad.pdf
    • http://thegreatfactor.com/uploads/1/3/0/7/130775572/0e11807e8ac90.pdf
    • http://mamasamosa.com/uploads/1/3/0/2/130287238/remefutufip.pdf
    • http://www.victoriatravel.biz/uploads/1/3/0/5/130539408/kalesoborawujil.pdf
    • http://cinemapurgatoria.com/uploads/1/3/0/7/130740497/zesesow.pdf
    • http://sandyridgebaptistchurch.org/uploads/1/3/0/4/130476574/bikowuf.pdf
    • http://applesintheseed.com/uploads/1/3/0/7/130739777/todimawirofid-zijuxosajedolad-wakal.pdf
    • http://saloteflorist.com/uploads/1/3/0/5/130551700/1189375.pdf
    • http://mountainsportandfitness.com/uploads/1/3/0/6/130621640/83bedb1f7a20cab.pdf
    • http://007securitynetworking.com/uploads/1/3/0/2/130272609/lepud.pdf
    • http://kathleencurry.net/uploads/1/3/0/6/130621443/4cd16b604f.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a0a.bin
2e035060a49fd021e1b6ac190857f5f5a3d2cb5e78c020c971338ba094391870		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0A 7772 bytes
font_01_sfnt_off0000982c.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x982C 2652 bytes

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