Malicious PDF — malware analysis report

Static analysis result for SHA-256 de235848768b8ee7…

MALICIOUS

PDF

50.3 KB Created: 2020-04-21 17:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 995d77f6fe4851a1f297ac457c70fa3c SHA-1: 35982e068dd2eed8b58ad2586baff570cf7e5158 SHA-256: de235848768b8ee7af57e70ef9518602e73ae8b063c153a26d1e6bea323d7205
92 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, indicating it is part of a link farm. The document body, though partially corrupted, suggests a lure related to 'Tire size guide pdf'. The heuristic 'PDF_SEO_LINK_FARM' confirms the presence of numerous external PDF links, with '55688carce.com' being a dominant host. This suggests the primary purpose is to redirect users to potentially malicious content hosted on these linked domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://theopengarage.com/uploads/1/3/0/3/130323190/130323190.html#tire+size+guide+pdf
    • http://55688carce.com/uploads/1/3/1/4/131406960/6d7400ba4b2f31.pdf
    • http://rtrealestateventuresllc.com/uploads/1/3/0/7/130738681/kiret-gonigufeguxova.pdf
    • http://globalpollution.net/uploads/1/3/1/4/131437291/344443.pdf
    • http://bestpaonline.com/uploads/1/3/0/5/130588571/vasupizoduwik.pdf
    • http://davidagordon.us/uploads/1/3/0/5/130551777/jogebanejab_tinazuf_kobomabavik_givetevo.pdf
    • http://greenplanetonline.org/uploads/1/3/1/6/131606284/nilijojuxag-nemisuxoweda-xesulu.pdf
    • http://transfer-university.com/uploads/1/3/0/5/130588681/segakezes.pdf
    • http://therogueplanet.net/uploads/1/3/0/7/130739661/f91f1f27bef071.pdf
    • http://grheatingandcooling.net/uploads/1/3/1/3/131380845/dapagolamemel.pdf
    • http://littleblacktote.com/uploads/1/3/0/8/130874332/640138a354f94.pdf
    • http://homeschoolsocial.org/uploads/1/3/0/5/130538816/gezilo_kokukeresojoviv_pukadezi_zepabal.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f7c.bin
02c1495bf19f77d3b542e2cf417821ffc05473bfa3be8258e679e80c1b80e2b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F7C 7960 bytes

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