Malicious PDF — malware analysis report

Static analysis result for SHA-256 91db1b8e03645540…

MALICIOUS

PDF

50.9 KB Created: 2020-03-20 03:29:52 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 52b1629f2ec0804e89592b51436270fc SHA-1: 7bd40f2b2a362719e36f7f2efb77223e74c7ebe6 SHA-256: 91db1b8e036455400b180e76574c806668e133b5107731ab091f8cf4e31d52aa
62 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body contains a Spanish phrase about a square root, which appears to be a lure. The primary purpose seems to be directing users to a link farm of other PDF documents hosted on various domains, likely for SEO manipulation or to serve as a distribution point for further malicious content.

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://tuitionhotsauce.com/uploads/1/3/0/5/130551059/130551059.html#cual+es+la+raiz+cuadrada+de+81+elevado+a+la+4
    • http://jemzkamexpress.com/uploads/1/3/0/9/130969923/jodor-xazuxezuges.pdf
    • http://swkitchen.com/uploads/1/3/0/2/130289658/6620123.pdf
    • http://bankruptcyattorneycapecoral.org/uploads/1/3/0/2/130288456/kigesebuxigimi_vakamorepuj_zoxofi.pdf
    • http://bayanesthesia.com/uploads/1/3/0/7/130775131/7599947.pdf
    • http://shop.sportsbands.com/uploads/1/3/0/6/130604273/1660418.pdf
    • http://focusantiglare.com/uploads/1/3/0/7/130739517/zixejapabej.pdf
    • http://www.deveralogic.com/uploads/1/3/0/3/130379423/sejaduwepudi-nadol.pdf
    • http://thathootchie.com/uploads/1/3/0/4/130436204/nisuxap.pdf
    • http://mail.nollin.dk/uploads/1/3/0/8/130813025/ad56a7da6ec.pdf
    • http://jakeberman.net/uploads/1/3/0/8/130814173/zisazofod.pdf
    • http://moscowshamrocks.com/uploads/1/3/0/3/130379741/fffcfeeca1c949.pdf
    • http://hostmaster.va-instrument.se/uploads/1/3/0/9/130969235/f01b8.pdf
    • http://missionhere.org/uploads/1/3/0/6/130639712/a11eb485.pdf
    • http://ucdllp.com/uploads/1/3/0/6/130604782/lalafabujuluwisa.pdf
    • http://cecilyeiferle.com/uploads/1/3/0/9/130969813/fisasokavidimorabe.pdf
    • http://8880evergreen.com/uploads/1/3/0/5/130590314/926ce13ad88.pdf
    • http://www.owens-for-mayor.com/uploads/1/3/0/5/130588363/jogadapowasibatusu.pdf
    • http://microfinanceprofessionals.net/uploads/1/3/0/5/130588712/8db14bc.pdf
    • http://longislandrack.com/uploads/1/3/0/6/130604862/baxabano-dijanofeze-podavikix.pdf
    • http://connectionsthruart.com/uploads/1/3/0/2/130289519/079d1562ea.pdf
    • http://mrswatsonsroom.com/uploads/1/3/0/2/130291552/bifoso.pdf
    • http://bsmart.be/uploads/1/3/0/4/130483478/be758.pdf
    • http://shootouthoops.com/uploads/1/3/0/4/130483140/wenixu.pdf
    • http://neverdonefiberfarms.com/uploads/1/3/0/6/130621873/0c7f98d8da62.pdf
    • http://moscowshamrocks.com/uploads/1/3/0/3/
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074d3.bin
463ba2397127b5a51e2f0a2ce211b79a44e7983736451884988f89276bf98b32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D3 8404 bytes
font_01_sfnt_off000093f6.bin
014b883c0d038e383903631a5fcffcc244b58e9f619ee7c1c744a32498a722c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93F6 5016 bytes
font_02_sfnt_off0000a489.bin
893b9af18feb1adfdf9be166e91a29f6579e446fc4e1cf2129b46ea14f7cb700		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA489 16360 bytes

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