Malicious PDF — malware analysis report

Static analysis result for SHA-256 307ba6399d6bcf04…

MALICIOUS

PDF

37.4 KB Created: 2020-03-21 16:25:42 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: aaa1f902c26f807e2ca6e044603f00df SHA-1: 786ecb646861e4f7b3e24001ff24f332e07d854f SHA-256: 307ba6399d6bcf04766e00f2038b40904eb72278a943045fb5d9e2e0e06f6cd7
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body itself is largely unreadable, but the presence of numerous links to other PDF files suggests a link farm or distribution mechanism. The primary attack pattern involves directing users to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://i-pec.biz/uploads/1/3/0/5/130589009/130589009.html#non+monsieur+mon+mari+text
    • http://thepuckingcatalinawinemixer.net/uploads/1/3/0/7/130775583/1787102.pdf
    • http://uxguys.mobi/uploads/1/3/0/6/130621619/9fcc00901c82.pdf
    • http://sitbackrobotics.com/uploads/1/3/0/2/130289411/kejogekujefitoxoxaw.pdf
    • http://untappededtech.com/uploads/1/3/0/7/130775557/nozudiwu-nerali-bobijawilemazi-vuwupu.pdf
    • http://492308979696373346.com/uploads/1/3/1/0/131071253/vasexiled-ximelapa-mafufiz.pdf
    • http://minerup.com/uploads/1/3/0/6/130621575/wekegad.pdf
    • http://accreteequitypartners.com/uploads/1/3/0/8/130874113/779766.pdf
    • http://www.paulburris.net/uploads/1/3/1/0/131071145/jejefetudabo-jifeso-luzunaluzexot-domisoxu.pdf
    • http://beyourbe.com/uploads/1/3/0/5/130588280/zidoriruzivuluvo.pdf
    • http://www.ebookcover-art.com/uploads/1/3/0/3/130324050/2421056.pdf
    • http://ramblinghouseshow.com/uploads/1/3/0/3/130323422/3dfd0b81b851b.pdf
    • http://simplemeals.ca/uploads/1/3/0/4/130435777/kozobojimijerimepos.pdf
    • http://adsl-63-199-172-5.realtime-comm.com/uploads/1/3/0/7/130776096/a9227c024.pdf
    • http://drjenglishlavc15.com/uploads/1/3/0/6/130604283/pevukuwiburobubef.pdf
    • http://merrick-global.com/uploads/1/3/0/6/130604949/tikurukasojuv.pdf
    • http://fromrussiatoamerica.com/uploads/1/3/0/5/130541131/zitedabi.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_off00006729.bin
fd1d30d8103c5a6c5f842a3f44f4ad2932f867dd806bfabd68dc753c61d9a380		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6729 9080 bytes

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