Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf6c410491dc2ce…

MALICIOUS

PDF

130.2 KB Created: 2020-04-01 12:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 66ddcba378cbb14ad8ea994578d6f509 SHA-1: 5549225af06d8582f7abc6f18a9a5ab0a373840e SHA-256: daf6c410491dc2ceeb3a96f5feb49621d00769db3ff1f5a2dee459cb77ff8706
62 Risk Score

Malware Insights

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

The PDF document is disguised as a chemistry solution manual to deceive users. It contains a large number of embedded external links, forming a link farm, which is a common tactic for SEO poisoning or distributing malicious content. The primary URL identified is http://katmacenas.com/uploads/1/3/0/6/130639409/5c2e6f0f1e6fec.pdf, which is part of this link farm.

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://katmacenas.com/uploads/1/3/0/6/130605432/130605432.html#quimica+2+bgu+solucionario
    • http://abnconsultancy.com/uploads/1/3/0/5/130590779/6160368.pdf
    • http://sunflowerhealthstore.com/uploads/1/3/0/6/130605357/6622003.pdf
    • http://macdesignthinking.com/uploads/1/3/0/5/130588343/solofadupu_dezovorugevogur.pdf
    • http://natepupel.com/uploads/1/3/0/7/130776529/wawutamegumu.pdf
    • http://bassania.org/uploads/1/3/0/2/130289333/sigikegev.pdf
    • http://dennismbusch.com/uploads/1/3/0/8/130874439/3062924.pdf
    • http://amarkpainting.net/uploads/1/3/0/4/130435771/tagit-minotadebos.pdf
    • http://mobius-pictures.com/uploads/1/3/1/0/131070598/8963093.pdf
    • http://islandbeachclubsanibelflorida.com/uploads/1/3/0/6/130639409/5c2e6f0f1e6fec.pdf
    • http://lostroads.com/uploads/1/3/0/4/130483806/0d15b700b6a5764.pdf
    • http://slipublishing.com/uploads/1/3/0/4/130435715/dofujukomadulugan.pdf
    • http://nailspirit.com/uploads/1/3/0/5/130551311/nusikekowuf.pdf
    • http://selectmanlaurahowe.com/uploads/1/3/1/0/131070230/8055855.pdf
    • http://houseofmooi.info/uploads/1/3/0/6/130604547/d02fd060c.pdf
    • http://robwaldman.net/uploads/1/3/0/4/130488780/vomumavezozovir.pdf
    • http://poledancestars.net/uploads/1/3/1/1/131163863/xepaxobebe.pdf
    • http://stpeterbaptistchurch.org/uploads/1/3/0/2/130288811/lagoparit.pdf
    • http://tweezty.com/uploads/1/3/0/8/130813317/kozudo_rerowajoputaper_xikabetududoxo.pdf
    • http://abadacapoeirasthlm.com/uploads/1/3/0/7/130775309/naxoki.pdf
    • http://deluxehairs.com/uploads/1/3/0/6/130640010/4776970.pdf
    • http://pointfiftytwo.com/uploads/1/3/0/5/130590029/daribesubasonepewitu.pdf
    • http://shopsimplybundles.com/uploads/1/3/0/2/130272352/7305366.pdf
    • http://ioinnovative.com/uploads/1/3/0/6/130639566/polizusevo_befak.pdf
    • http://bethegoodhands.com/uploads/1/3/0/2/130289551/7618715.pdf
    • http://uclik.ca/uploads/1/3/0/4/130490977/vaforeki-nakibolovigesif-dimus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b2c8.bin
a2b0defde124a1e5d7475621b94d16f92eabd8389f41e23336abdecc006f95e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2C8 10472 bytes
font_01_sfnt_off0001d783.bin
392c0c5eee1700edb56545c228c9187b1dc290a088a16296be7b1ba6a26b78f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D783 2964 bytes
font_02_sfnt_off0001e1b0.bin
506616cae2f9c92a2b291329ee9000ab06225e77fee0761603d153832e735972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E1B0 16312 bytes

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