Malicious PDF — malware analysis report

Static analysis result for SHA-256 37cf7f6b0e588985…

MALICIOUS

PDF

52.5 KB Created: 2020-03-23 06:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8bc4ae1447a92089dabd458e7ef734b8 SHA-1: f8cc9c019b39bb01deefe2662ff303cc5a8cefdf SHA-256: 37cf7f6b0e588985ff2fca3b664619f1ff0c7a396962901a08b35cf1624911c7
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files on different domains, suggesting a link farm or distribution network. The primary URL found in the document body is http://freshmanimpact.net/uploads/1/3/0/7/130775260/130775260.html#edgar+degas+obras+de+arte, which is also part of this network. No scripts were extracted, and the document body is heavily obfuscated, but the sheer volume of outbound links is highly suspicious.

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://freshmanimpact.net/uploads/1/3/0/7/130775260/130775260.html#edgar+degas+obras+de+arte
    • http://wellbeinginbusiness.org/uploads/1/3/0/5/130546717/jetepo_tusowunogobe.pdf
    • http://ninjatechnologies.com/uploads/1/3/0/7/130776132/verobu_jozowunufuj_wijigiworaf.pdf
    • http://www.iotathatch.com/uploads/1/3/0/4/130477533/xuvaniwawovite_lodimisa.pdf
    • http://sisusporthorse.com/uploads/1/3/0/7/130739446/dezun.pdf
    • http://www.bayphysiotherapyandpilates.com.au/uploads/1/3/0/6/130621596/texologub.pdf
    • http://thetravelinghippies.com/uploads/1/3/0/8/130814803/defovuxubazizu.pdf
    • http://www.massageandbodyworkhealingartsstudio.com/uploads/1/3/0/2/130272591/8613373.pdf
    • http://unilifesupermarket.com/uploads/1/3/0/6/130605028/4136443fb.pdf
    • http://sandymscraftssupplies.com/uploads/1/3/0/5/130539203/1072716.pdf
    • http://dravivadawn.com/uploads/1/3/0/5/130539091/5e96cab.pdf
    • http://www.aeem.com.au/uploads/1/3/0/6/130621384/pedise-jidexug-vokezeru.pdf
    • http://salishman.com/uploads/1/3/0/7/130775403/3635779.pdf
    • http://significadodeemojis.com/uploads/1/3/0/6/130620626/sobaka_nawunezuj_tiporuze.pdf
    • http://dangerzoneuboldo.com/uploads/1/3/0/5/130542872/fedikavojop-moludolokesewud-guseguzajidojo.pdf
    • http://www.hr4slo.com/uploads/1/3/0/4/130435555/e91a390ea0644e1.pdf
    • http://reimaginegovernment.com/uploads/1/3/0/5/130539270/lakujofupixexasuve.pdf
    • http://restorativejuveniledetention.org/uploads/1/3/0/5/130588601/nipekugufowevenu.pdf
    • http://inscienceitrust.net/uploads/1/3/0/6/130639076/vuzerijujimibudobo.pdf
    • http://robertandsteven2019.com/uploads/1/3/0/6/130621205/1625421.pdf
    • http://dynamicresn.com/uploads/1/3/0/6/130621283/sepodozol.pdf
    • http://masterdoeuvre.com/uploads/1/3/0/4/130483875/9721756.pdf
    • http://dominikkonsoloslugu.net/uploads/1/3/0/4/130483673/e4a20c876778cfd.pdf
    • http://thefionarae.com/uploads/1/3/0/8/130815059/jesujofo_nivajedixoli.pdf
    • http://thefionarae.com/uploads/1/3/0/8/13081505
    • 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_off000097d5.bin
868a8f539723db340d804a54aff6d8137bb35a524154958f881571d6f07a51c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x97D5 10200 bytes
font_01_sfnt_off0000b903.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea
pdf-font-stream PDF embedded font (sfnt) at offset 0xB903 2652 bytes