Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39036ad47479cb9…

MALICIOUS

PDF

44.5 KB Created: 2020-04-05 10:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8f1620b3be1e3e3ca8bf408586738f51 SHA-1: 58c3d097e68b5f51e26cf080f29515ad1dce5ef7 SHA-256: f39036ad47479cb960e282fba6a516999877fc894c6b9c496b97fccda18b1782
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO poisoning or to direct users to malicious websites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating the document's primary purpose is to facilitate traffic to these external URLs. No scripts were extracted from this sample, and the document body is heavily obfuscated, making it difficult to determine the exact lure or payload.

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://rebeccapickens.com/uploads/1/3/0/8/130815009/130815009.html#omron+pedometer+manual+hj-320
    • http://clsbaunity.org/uploads/1/3/0/5/130543402/6862509.pdf
    • http://mta-sts.vtk9.com/uploads/1/3/1/3/131380985/9b71b19517e152.pdf
    • http://planetswim-asia.com/uploads/1/3/0/7/130738607/vakudugonow.pdf
    • http://thetradersgroup.org/uploads/1/3/1/3/131382141/851bb.pdf
    • http://ruthharpsterphotography.com/uploads/1/3/0/6/130605462/9282321.pdf
    • http://acreativedesigncompany.com/uploads/1/3/0/7/130776132/gogaregetuziwotufak.pdf
    • http://masalanproject.com/uploads/1/3/0/6/130621206/kurugavopipukadaje.pdf
    • http://sesacademy.org/uploads/1/3/0/7/130739510/sozesuseka.pdf
    • http://ybfa.co.uk/uploads/1/3/0/4/130478831/9acaf696fffc17.pdf
    • http://karenjhudson.com/uploads/1/3/0/4/130489072/8393948.pdf
    • http://cliffordspeechlanguagereading.com/uploads/1/3/0/4/130436028/lubekotogune.pdf
    • http://fishers-point.com/uploads/1/3/1/4/131437561/kodagow.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_off00007c22.bin
0afc823b59679ca897eb99e3472b60718d579607b206e7d2ac5aeb332bc30521		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C22 8140 bytes
font_01_sfnt_off00009bc2.bin
8e6ff32b2d2fb708515724163c3589359ffba164eebe2f02c49a44862880ad89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC2 2736 bytes

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