Malicious PDF — malware analysis report

Static analysis result for SHA-256 4096e760abae7584…

MALICIOUS

PDF

107.4 KB Created: 2020-05-18 00:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80a25935577dfb9636d71a9eddcbc369 SHA-1: 9721fff54914a77d62d11d640300b4e3bd4bab8c SHA-256: 4096e760abae758433ef3c874bb640ecfa3aab1b4855eaec08ed360a33744186
62 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution mechanism. The document body itself is heavily obfuscated and contains some of the URLs, but does not provide clear instructions. No scripts were extracted from this sample. The primary attack pattern appears to be the distribution of numerous external links, likely to manipulate search engine results or to serve as a lure for further malicious activity.

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://wpcg.org/uploads/1/3/0/6/130604388/130604388.html#cpc+1017+datasheet
    • http://godseffect.com/uploads/1/3/0/4/130436074/acf3be4ad58.pdf
    • http://examplesite.biz/uploads/1/3/0/3/130313000/1cd185e867.pdf
    • http://entreprenorth.org/uploads/1/3/1/4/131437394/9fa17.pdf
    • http://sunnybottom.com/uploads/1/3/0/6/130639266/f77bf794b2.pdf
    • http://icrj-aejmc.com/uploads/1/3/0/5/130540554/38c239299a3bf.pdf
    • http://etherealimageadvent.org/uploads/1/3/0/7/130776814/9837603.pdf
    • http://homemortgage.services/uploads/1/3/1/3/131379420/mavidujekejufus.pdf
    • http://emilygerngross.com/uploads/1/3/0/4/130483290/fexatumofan.pdf
    • http://plusquevainqueur.net/uploads/1/3/1/3/131381712/vitemisa.pdf
    • http://provide-coffee.com/uploads/1/3/0/2/130270918/8094357.pdf
    • http://lowesttruckinsurance.com/uploads/1/3/1/1/131164202/bomibidif_mapub_veraberog_jomiwa.pdf
    • http://vivianscrown.com/uploads/1/3/0/8/130874563/sijolesab_xorolavatugadig.pdf
    • http://homespryte.com/uploads/1/3/0/6/130621330/mazeweve_fitoberoxu.pdf
    • http://kirkjayfanclub.com/uploads/1/3/0/6/130620846/553064.pdf
    • http://vcvids.com/uploads/1/3/0/4/130436242/maduxukalagikadi.pdf
    • http://notyourshop.com/uploads/1/3/1/8/131857334/886308f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000063a8.bin
9a0c3713212149fbffef1b43660e7e1f9e6fd3bed5f66bfd4f6ff627156cbdeb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x63A8 84816 bytes
font_01_sfnt_off00016093.bin
d95a1394d50551dfa44d9d8e2c5d5d41c646b6f946f4b5f3f87ff6896f17a76f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16093 11764 bytes
font_02_sfnt_off0001890b.bin
386b790d1d9ce13b171fa75da4b230246976ad5417fcb3c45d956e9311ee73f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1890B 16208 bytes

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