Malicious PDF — malware analysis report

Static analysis result for SHA-256 d315a8c1c2661e4b…

MALICIOUS

PDF

35.3 KB Created: 2020-05-17 00:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4230b925d21f8bdcb09506ec8c5a4a2c SHA-1: 19a8ab01c65eaf9d3ae14c7e9b6674e94d3a7b42 SHA-256: d315a8c1c2661e4bb3340538d91497c6d456dcdae0d5db100fbb494093a66942
70 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. The document body, though partially corrupted, contains text related to 'Algebraic expressions and identities worksheets', suggesting a lure to disguise the malicious nature of the links. The primary intent appears to be directing users to a network of potentially malicious or deceptive PDF content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://marmarworld.com/uploads/1/3/0/8/130873902/130873902.html#algebraic+expressions+and+identities+worksheets-+grade+8
    • http://fairwayservicesinc.com/uploads/1/3/0/7/130775962/topilalu.pdf
    • http://robertfisherhistoricalart.com/uploads/1/3/1/3/131398076/1c262f315741dd2.pdf
    • http://vectorbotx.com/uploads/1/3/0/4/130491181/4453606.pdf
    • http://mpmechanical.org/uploads/1/3/0/8/130874672/buzaninake-safetezeb-rulavopi-fuzipasug.pdf
    • http://preferredcapitalfinance.com/uploads/1/3/1/0/131070505/zizumu.pdf
    • http://freshfromconcentrate.com/uploads/1/3/0/4/130489262/3151055.pdf
    • http://culebrasailingcharters.com/uploads/1/3/0/5/130588712/puwajetuminet.pdf
    • http://mynaturalrecovery.com/uploads/1/3/0/6/130604996/fe395b5cde5b38.pdf
    • http://timeforimpeachment.com/uploads/1/3/0/7/130739968/xegeku-mulob-komabik-nofufebidoxe.pdf
    • http://chiefexecutiveoffice.us/uploads/1/3/1/0/131071298/fulebeleli.pdf
    • http://dngracingteam.com/uploads/1/3/0/6/130604148/037fda8320b185.pdf
    • http://financialliteracy101.net/uploads/1/3/0/3/130313702/8df49e.pdf
    • http://grayroncal.com/uploads/1/3/0/6/130620365/874e1e3c1b9b.pdf
    • http://pigskinwin.com/uploads/1/3/0/4/130435670/moxubasiku.pdf
    • http://bhmanz.com/uploads/1/3/1/8/131856495/bofove_mupemunis_befugitusok.pdf
    • http://neuroimmune.net/uploads/1/3/0/9/130969076/7e410.pdf
    • http://thewholisticyou.com/uploads/1/3/0/8/130873995/zivagex-gidad.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_off00005ed0.bin
a5edd3be10c13b405033e20e530f4a8fa35509805ac429ad119e6e69746af0a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED0 10060 bytes

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