Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee3f2a1e759eff1…

MALICIOUS

PDF

46.5 KB Created: 2020-04-02 07:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4ac1a9620a19ba0c936396956512823c SHA-1: 38f5fbde5b76a5b527b0fde3bd373bc3621907cc SHA-256: 9ee3f2a1e759eff1641f48943078d2e15b2d83555f69dc4307f2199a69971e43
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of 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 SEO manipulation tactic. The document body contains text related to a book title, which is likely a lure to disguise the malicious intent of distributing numerous external links. No scripts were extracted from this sample.

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://wordsmith-sg.com/uploads/1/3/1/1/131164472/131164472.html#vector+calculus+linear+algebra+and+differential+forms+5th+edition
    • http://eventsandmoore.com/uploads/1/3/0/6/130604031/8906313.pdf
    • http://calpolymca.com/uploads/1/3/1/3/131398143/zijoxazelukoki_padowobidu_bilimonupuxij.pdf
    • http://trevirent.com/uploads/1/3/0/7/130775211/71744f51afb.pdf
    • http://minnesotalowvision.com/uploads/1/3/0/6/130603835/vavifid.pdf
    • http://modelshouston.com/uploads/1/3/0/5/130588480/mafabamu.pdf
    • http://milwaukeewindowwashing.com/uploads/1/3/0/8/130814471/968100.pdf
    • http://lashmechanical.com/uploads/1/3/0/6/130639224/zorokovofimo-nezesonimixu-dopazinorus.pdf
    • http://grinx.net/uploads/1/3/0/9/130969637/wagufopevop.pdf
    • http://nla401kmep.com/uploads/1/3/1/4/131437849/wubage.pdf
    • http://neuropsicopedagoga.net/uploads/1/3/0/6/130605059/tigefigaraki.pdf
    • http://thayseizidro.com/uploads/1/3/0/4/130476150/sebesevenutupurax.pdf
    • http://pasprofessionalaeronauticalso.net/uploads/1/3/0/7/130740069/ruwusafakukapub_gurorabo_kepukodaw.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_off000075ab.bin
0305e92b9572e0e3b1824e8bc989bdf9430547c7e5fe12fb821b6487bdc22c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75AB 8752 bytes
font_01_sfnt_off0000970c.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x970C 16036 bytes

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