Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab817bb5c1b991c…

MALICIOUS

PDF

31.1 KB Created: 2020-06-07 01:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3d7413347594af44d127d39c667c5c7 SHA-1: 84881c445d4b5087a49e69bfb832d8295d118905 SHA-256: bab817bb5c1b991c4ec46b5cf9b2a1236f2fef483f5baa65d3c63e37672c7a89
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, a technique often used for SEO spam or to distribute malicious content. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the extensive link farm suggests a delivery mechanism for further payloads or a redirection scheme.

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://iavnt.com/uploads/1/3/1/1/131164475/131164475.html#%25C3%25B6%25C4%259Fretim+ilkeleri+test
    • http://cindycoopercatering.net/uploads/1/3/0/5/130539336/5326520.pdf
    • http://destresswithtaichi.com/uploads/1/3/0/8/130813855/nulasoxinemoxena.pdf
    • http://ooakco.com/uploads/1/3/1/4/131438044/872d0c3.pdf
    • http://15kyg.bpmtc.com/uploads/1/3/0/2/130271090/mijamar-botusorudifuve-ponuviwol.pdf
    • http://cpanel.ptnow.net/uploads/1/3/0/5/130588425/d3a1142e59.pdf
    • http://webdisk.civicleagueforncc.org/uploads/1/3/1/3/131384211/5d4be0.pdf
    • http://suzannemuir.ca/uploads/1/3/1/4/131406449/xavukuzexoxoru_rewafo_gozinosub.pdf
    • http://hostmaster.haematology.com.au/uploads/1/3/0/3/130312912/bavimizajesuzenab.pdf
    • http://thrivecommunitycare.co.uk/uploads/1/3/1/8/131871602/mapopez.pdf
    • http://adzdoneright.com/uploads/1/3/0/7/130739222/suverofezur.pdf
    • http://mail.becorefit.com/uploads/1/3/0/6/130639356/4174044.pdf
    • http://tuffmoney.net/uploads/1/3/0/2/130289746/2770221.pdf
    • https://galikakibim368740973.files.wordpress.com/2020/06/54834403598.pdf
    • https://wufabok.files.wordpress.com/2020/06/28519992953.pdf
    • https://pekuseni.files.wordpress.com/2020/06/kewamezus.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_off00004cd1.bin
bb7f32e263a8a463a48d6ecef9216a745b38dd85dd2f1872e8ec0a886078dd4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CD1 10688 bytes

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