Malicious PDF — malware analysis report

Static analysis result for SHA-256 c718ca269cc7f43b…

MALICIOUS

PDF

35.0 KB Created: 2020-03-10 10:58:21 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 81e7258943f57163e9cbfd38e2137536 SHA-1: d5195d860e452ac8135f8ba2882f5af5b8af2223 SHA-256: c718ca269cc7f43b4677cae3dfc2583a76446a4fbef6e91b8217400dd17b6642
62 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, many of which point to similarly structured URLs on different domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content across various hosting sites. The document body, though partially corrupted, suggests an attempt to disguise the malicious intent by appearing as educational worksheets. The primary attack pattern involves luring users to click on these external links, which likely host further malicious payloads or phishing content.

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://app-pof.com/uploads/1/3/0/4/130435777/130435777.html#finding+area+and+perimeter+of+rectangles+worksheets
    • http://shastalakegardenproject.club/uploads/1/3/0/5/130540211/tenutufebo_lakifuw.pdf
    • http://flinthammer.com/uploads/1/3/0/5/130589036/8432449.pdf
    • http://designadrum.com/uploads/1/3/0/4/130476649/volik-sasunuvaze.pdf
    • http://66-162-180-6.wcreekoh.com/uploads/1/3/0/4/130483980/d5e36f216c.pdf
    • http://www.donyawicken.com/uploads/1/3/0/7/130775998/5848691.pdf
    • http://www.gillislawgroupmd.com/uploads/1/3/0/8/130873957/8495053.pdf
    • http://albertapreventative.com/uploads/1/3/0/2/130270746/pofofatu.pdf
    • http://cavecellars.com/uploads/1/3/0/7/130776110/jusavatinujid.pdf
    • http://knicksknits.com/uploads/1/3/0/2/130272963/9f3282a5.pdf
    • http://cumuluscountry.com/uploads/1/3/0/6/130621068/xubupefi.pdf
    • http://otxms.com/uploads/1/3/0/7/130738996/1037962.pdf
    • http://financialskyline.com/uploads/1/3/0/6/130620899/3486477.pdf
    • http://reannhuber.com/uploads/1/3/0/3/130313004/dinajupi-jubojaloxuduraj-zujuke-foxodibu.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_off000061a9.bin
eb5dbf4cf17ae9dcbde6e14195d75e24986cadd5770b7a590706f3f2f84c9fb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A9 7436 bytes

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