Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b9318fb777be2e…

MALICIOUS

PDF

60.2 KB Created: 2020-03-24 01:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 31ccfcd6e6a1574fffd3b39b06315111 SHA-1: 351f4679b3f129a35f18bb97867f0c30770f8acf SHA-256: 68b9318fb777be2e92f202defd398ed4c35fc9bee0e3eb287093332dc81425dc
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though partially corrupted, includes a URL that is also present in the list of extracted URLs. The ML classifier strongly indicates maliciousness. The primary attack pattern appears to be directing users to a vast network of potentially malicious or SEO-manipulated websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://allamericanhandyman.org/uploads/1/3/0/6/130620354/130620354.html#la+estructura+de+las+mitocondrias+y+los+cloroplastos+permiten+argumentar+a+favor
    • http://usmvmcme1.org/uploads/1/3/0/7/130776279/207d018a6e.pdf
    • http://cntermacx.info/uploads/1/3/0/8/130813320/7138052.pdf
    • http://buyorsellyours.com/uploads/1/3/0/4/130483142/xutozemowem.pdf
    • http://momentumwomenscenter.com/uploads/1/3/0/8/130873735/laxuv.pdf
    • http://stuffthatsneat.com/uploads/1/3/0/6/130605216/javowenuluni.pdf
    • http://4thgencustoms.com/uploads/1/3/0/8/130813557/polojibijukal.pdf
    • http://youngkingaudio.com/uploads/1/3/0/6/130621614/durinitop.pdf
    • http://ccassessments.org/uploads/1/3/0/7/130775870/bajejetoponikibaru.pdf
    • http://balonprocess.com/uploads/1/3/0/3/130323403/2588524.pdf
    • http://theglampersalon.com/uploads/1/3/0/5/130589220/fumageleroturane.pdf
    • http://cpanel.adrianamedinacagan.com/uploads/1/3/0/7/130775986/varazajezapowejowek.pdf
    • http://integrityresearchconsulting.com/uploads/1/3/0/2/130272347/4f5ad0c9b.pdf
    • http://www.brushworkbyarlenebuster.com/uploads/1/3/0/3/130323405/6287491.pdf
    • http://nutritionwithnahla.net/uploads/1/3/0/4/130483820/6015518.pdf
    • http://freshspacesolutions.com/uploads/1/3/0/5/130543685/69e4728.pdf
    • http://shibagarden.com/uploads/1/3/0/2/130271201/2c7b360.pdf
    • http://wmgeeks.com/uploads/1/3/0/5/130589031/padifetofiwivo.pdf
    • http://farhadebrahimi.info/uploads/1/3/0/7/130739885/58435d3ba52.pdf
    • http://cnchomecrafts.net/uploads/1/3/0/6/130621630/8201066.pdf
    • http://www.ydroplastiki.com/uploads/1/3/0/4/130494478/2618304.pdf
    • http://mythebestsully.org/uploads/1/3/0/4/130476004/3653955.pdf
    • http://mrdryit.com/uploads/1/3/0/2/130272342/2558441.pdf
    • http://cpanel.dcachurch.net/uploads/1/3/0/7/130775961/zuludo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a19a.bin
9177c7925033a3885a0a0a11daaeefa18201d47b551a12f658c68bb43c96a630		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA19A 9044 bytes
font_01_sfnt_off0000c292.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC292 2652 bytes
font_02_sfnt_off0000cbf9.bin
f77ae30e2eec2ca3578253c0a086b7b4bc83d4d366503269d9bfd12176ed9dae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF9 16040 bytes

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