Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb266a5fb7618b21…

MALICIOUS

PDF

41.1 KB Created: 2020-04-19 05:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ff94a1786981ce39bd2e1ed75ada669d SHA-1: f5b14dcc1a48920a8fbe27e0bf1268bd2c5fa8bb SHA-256: fb266a5fb7618b21dd82d8e9b9ef5a541ddb3f45ce74b9b7560426db8312200e
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or SEO spam campaign, designed to artificially inflate search engine rankings or redirect users to potentially malicious sites. The document body itself is heavily obfuscated and contains what appears to be metadata rather than user-facing content, further supporting the interpretation that the primary function is link distribution.

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://multistreams.com/uploads/1/3/1/4/131407293/131407293.html#ccma+awards+performers
    • http://swedishholly.com/uploads/1/3/0/2/130289583/dexefi_dumufisata_tatoxexafuribo.pdf
    • http://nswauctionservices.net/uploads/1/3/1/6/131637176/24cc9a355eedda4.pdf
    • http://jtmarketingsvs.com/uploads/1/3/0/3/130379461/5a8f0.pdf
    • http://lawpoa.com/uploads/1/3/0/5/130545573/puroliwunini.pdf
    • http://helenyeplehn.com/uploads/1/3/0/4/130476548/zetijolekamoz_pefexugixev_zipujaluravo.pdf
    • http://ssuhc2k19.com/uploads/1/3/0/7/130739330/wikewolapedas.pdf
    • http://bluewolfcleaningservices.com/uploads/1/3/0/6/130620845/33cab442228.pdf
    • http://jtmarketingsvs.com
    • 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_off000061d9.bin
cd2065ab7482646d75ec8dc77a8d982de4ff66203239459affbe4942c7e51e07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D9 8972 bytes
font_01_sfnt_off00008427.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8427 16036 bytes

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