Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5a5689c1773a1e…

MALICIOUS

PDF

36.9 KB Created: 2020-04-09 13:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 85817345a136d13323d051124ecb3719 SHA-1: b036a328599f454443b35287f57525ff158e5d3a SHA-256: 4e5a5689c1773a1ed91967acec1f48c2deff17e7a81c8e82a9fc2ec14ab44a3c
62 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, many of which point to similarly structured URLs on different domains. The document body, while containing text about chemical nomenclature, also embeds URLs that lead to other PDF files. This pattern suggests a link farm or SEO poisoning technique designed to drive traffic to potentially malicious 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://nosnow.io/uploads/1/3/0/4/130483474/130483474.html#regla+para+la+nomenclatura+de+los+alquenos
    • http://austincomputerrepair.net/uploads/1/3/0/7/130775634/c976ed071f43ab.pdf
    • http://healtheats.org/uploads/1/3/1/4/131482821/volibizam.pdf
    • http://waypointfinancialmanagement.com/uploads/1/3/0/6/130620730/relolimetojutu.pdf
    • http://takenbysarahphotography.com/uploads/1/3/1/4/131453676/344179.pdf
    • http://vaq.si/uploads/1/3/0/2/130289681/nusama-migexizemufob-teximu-xupasuwibegu.pdf
    • http://bluemotherhealing.com/uploads/1/3/0/8/130814902/gewubefuwopebizun.pdf
    • http://mjreecy.com/uploads/1/3/1/4/131455543/fapelidamebiniko.pdf
    • http://thepdmg4u.com/uploads/1/3/0/6/130621708/vigesa.pdf
    • http://paskiclub.com/uploads/1/3/0/5/130588461/rarobuzexok.pdf
    • http://mastervladimir.com/uploads/1/3/1/3/131380436/758447.pdf
    • http://ariniyla.com/uploads/1/3/0/4/130483070/nuboruxofomul_duropamadiru_zewutowadu_powulosirag.pdf
    • http://aconversationofastarisborn.net/uploads/1/3/0/2/130270993/namir_lumutegixuj.pdf
    • http://davidbellmd.com/uploads/1/3/0/5/130590122/pujizalifoludosup.pdf
    • http://zenlotusyoga.com/uploads/1/3/0/8/130814460/xediferoz.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_off000066a2.bin
e823e050289d7b0b12894da6585a43968f656c1a48654bd4d1f3b789c456a721		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A2 8116 bytes

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