Malicious PDF — malware analysis report

Static analysis result for SHA-256 a84c103b3977498f…

MALICIOUS

PDF

51.3 KB Created: 2020-03-23 09:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 53a3b22e2e7e823bf09efb27d40a88c8 SHA-1: 8095cc3cca988abae3257c4153a932eae8dd3273 SHA-256: a84c103b3977498f1a80407f1e6b98d8e7df291783722d69e9120955e81370e2
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1598.003 URL/Domain Reputation Block

The PDF document contains a large number of external links, a technique often used for SEO manipulation or to distribute malicious content. The document body, though partially corrupted, suggests a lure related to statistical exercises. The primary heuristic identified a link farm of 16 external PDF links, predominantly hosted on 'vegantogosxm.com'. No scripts were extracted from this sample.

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://skyleslawfirm.com/uploads/1/3/0/2/130288577/130288577.html#ejercicios+de+estadistica+media+varianza+y+desviacion+estandar
    • http://vegantogosxm.com/uploads/1/3/0/7/130775331/93c26.pdf
    • http://mhynes.com/uploads/1/3/0/3/130313741/4dd7d21142d785.pdf
    • http://www.arnarnesparadis.com/uploads/1/3/0/2/130272571/jibulewematigogota.pdf
    • http://ladyablesartistry.com/uploads/1/3/0/3/130379239/betuvelaxan-susulazesakak-vojukemasi-gabofawum.pdf
    • http://energiasolarfotovoltaica.net/uploads/1/3/0/3/130379528/jujilokokopipowune.pdf
    • http://beyondbeliefthebook.com/uploads/1/3/0/5/130545753/57087b0ecd8.pdf
    • http://pairdbeauty.com/uploads/1/3/0/4/130476454/7488753.pdf
    • http://shopmaggiemaeboutique.com/uploads/1/3/0/5/130588810/8288167.pdf
    • http://adventsky.net/uploads/1/3/0/6/130621331/furupi.pdf
    • http://afcitypark.com/uploads/1/3/0/5/130551001/nerewemib_betisitusoj_sizekuw_webadojam.pdf
    • http://spatzen.hu/uploads/1/3/0/4/130489448/wusaf.pdf
    • http://dubairhythmicgymnastics.com/uploads/1/3/0/4/130488442/zelopidovomomu_fopemudu_zemagivuj_vefotuga.pdf
    • http://seekhavenresourcecenter.org/uploads/1/3/0/7/130740480/rafekix.pdf
    • http://www.prismlabradors.com/uploads/1/3/0/7/130739328/jilativuvupi.pdf
    • http://voting4all.nl/uploads/1/3/0/7/130740077/wokoxigizarujova.pdf
    • http://www.gravitysuccess.ca/uploads/1/3/1/0/131071252/4856122.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_off00007ccf.bin
968c41dd5a0c1201f5c13d43e52ab31ab02ad6cadfb33e821e3b88721b46e91d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCF 9060 bytes
font_01_sfnt_off00009d73.bin
9d747930df910d1b16f6aeae13eefb5503aa50145f1894bb37f8e7b711430b52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D73 2856 bytes
font_02_sfnt_off0000a7a5.bin
df5efbd9f539e0d3dc767554fbaab5991a9d69fd3343e08a3c9d199245486688		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A5 16064 bytes

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