Malicious PDF — malware analysis report

Static analysis result for SHA-256 85c263ffa8996b10…

MALICIOUS

PDF

45.4 KB Created: 2020-03-26 01:48:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 41da63facf5a934f03ec8f06e8c170f5 SHA-1: 089a4f4a725b6dc2bcb372f79763d8c17cc1f049 SHA-256: 85c263ffa8996b10a79c649fa9679b284fff9098e87a4db59bad2e170c5317ca
62 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm used to distribute malicious content or for SEO manipulation. The primary URL, http://evokefitness.net/uploads/1/3/0/5/130589346/130589346.html#reglas+para+la+resta+de+polinomios, suggests a lure related to educational content, which is then used to redirect users to potentially harmful sites.

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://evokefitness.net/uploads/1/3/0/5/130589346/130589346.html#reglas+para+la+resta+de+polinomios
    • http://www.mudgeehomeimprovements.com/uploads/1/3/0/2/130272649/duxev-nifakanujubuka.pdf
    • http://cricketsms.com/uploads/1/3/0/6/130605497/9889102.pdf
    • http://777lvloans.com/uploads/1/3/0/4/130490117/da9b2bb5fa96.pdf
    • http://chefericrupert.com/uploads/1/3/0/3/130379843/56d33b2.pdf
    • http://awhholdingsltd.com/uploads/1/3/0/7/130775199/gojebu.pdf
    • http://prettyplump.com.au/uploads/1/3/0/2/130291724/2647752.pdf
    • http://concordat3.pleasingfood.com/uploads/1/3/1/0/131070688/logodemib-romotefab.pdf
    • http://thesavagegentleman.com/uploads/1/3/0/2/130270811/06755.pdf
    • http://www.charlottedreamscapes.com/uploads/1/3/0/5/130546196/b34313f12.pdf
    • http://www.hanlinsci.org/uploads/1/3/0/7/130739746/87721243943d.pdf
    • http://www.alumni4ever.store/uploads/1/3/0/8/130814863/roranokonubuteb_difew_topelik_zusegiv.pdf
    • http://gadaboutmaine.com/uploads/1/3/0/7/130739142/botoxilupaga.pdf
    • http://www.yourheavenonearth.solutions/uploads/1/3/0/5/130588511/c2eea2702cb27b.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fb8.bin
be18365329c108b6b9abf2fbd01538c7567cc660e09a06f84c3644aa45602835		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB8 9192 bytes
font_01_sfnt_off00009125.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9125 16204 bytes

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