Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2775b0b81808ff4…

MALICIOUS

PDF

73.0 KB Created: 2020-04-06 08:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 00f83f90d626f333db3942117437521a SHA-1: 4aecb17a1b6c1e2a63f50bcffb2a8c4414bda869 SHA-256: c2775b0b81808ff4b7531f7940733f140261e1361004855c8d891753fb0d6798
92 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. One such link is http://sophiejanemcdonald.com/uploads/1/3/0/5/130590393/130590393.html#neutron+proton+ratio. This suggests the document's primary purpose is to redirect users to a network of websites, likely for malicious advertising, phishing, or to serve further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://sophiejanemcdonald.com/uploads/1/3/0/5/130590393/130590393.html#neutron+proton+ratio
    • http://lilybethdesigns.com/uploads/1/3/0/7/130775031/ca0d965.pdf
    • http://agsportsbar.com/uploads/1/3/0/8/130814758/sajavasa_ramawomubag_vetujigoxel_wowadakibaxub.pdf
    • http://taxfirmsolutions.com/uploads/1/3/0/4/130435601/9657910.pdf
    • http://mcgoof.com/uploads/1/3/0/7/130775358/garuni.pdf
    • http://esportsak.com/uploads/1/3/0/8/130814576/dixexozoditodaj.pdf
    • http://gypsytradingcosd.com/uploads/1/3/1/0/131070880/feganinijog-zujipejitoran-sipolufo.pdf
    • http://michellesdaycare.org/uploads/1/3/1/3/131383630/047792ff708.pdf
    • http://graht.com/uploads/1/3/0/6/130621496/lototoke.pdf
    • http://mykwalk.com/uploads/1/3/0/4/130436165/e4730e.pdf
    • http://voterichardnewton.com/uploads/1/3/0/7/130738497/bapiroxaj_nopomavalenufoj_metavusarasa_romituralepu.pdf
    • http://marcelgiger.com/uploads/1/3/0/7/130739117/litixulonugadi.pdf
    • http://averykholt.com/uploads/1/3/0/2/130287428/2023159.pdf
    • http://wellfocusedtechnologies.org/uploads/1/3/0/7/130776025/4992473.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
font_00_sfnt_off0000cfd1.bin
b578d079de305a565454c5e23f206b5dada0c681d4b1d05dd09774c444e4b218		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD1 9520 bytes
font_01_sfnt_off0000f388.bin
1bd2f0ada394623f212f3b8dfab9da537b0a39b6889afa1ebfba2f3febb4b725		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF388 3668 bytes
font_02_sfnt_off00010055.bin
1bacd625121bae58575e086217bf8f8d65448c134be67acd71375466d76293a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10055 16168 bytes

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