Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8900329ccc86332…

MALICIOUS

PDF

71.2 KB Created: 2020-03-12 06:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8fb8525dac7c65db5fc47584bf4ee6b3 SHA-1: e9745f1b67ed599f376d26ffbb054efb4cd55581 SHA-256: d8900329ccc863327a4b8883f34c8c5eca374db4ef87afdead8e63632dd0855b
62 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many of which are numerically or generically named, suggesting an SEO spam or link farm operation. The document body, though partially corrupted, includes a title related to medical morphology and references the wkhtmltopdf tool, indicating it was likely generated programmatically to host these links. The primary intent appears to be driving traffic to a network of unrelated websites.

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://1mwl.brdge.org/uploads/1/3/0/7/130775176/130775176.html#what+does+abnormal+red+blood+cell+morphology+mean
    • http://www.science4kids101.com/uploads/1/3/0/2/130291596/woxilipazebal_subozad.pdf
    • http://demitrydevelopment.com/uploads/1/3/0/3/130379311/0e65d7f48.pdf
    • http://rcloud.net/uploads/1/3/0/6/130604180/9a99ae0f1a.pdf
    • http://simplicityspeakslouder.com/uploads/1/3/0/6/130604112/rifuzomiso.pdf
    • http://pairofjacks.net/uploads/1/3/0/3/130323601/4064089.pdf
    • http://danicagoward.com/uploads/1/3/0/8/130874154/donatumejado.pdf
    • http://whiteoutfilms.ca/uploads/1/3/0/4/130489564/fe13fb90ffa.pdf
    • http://corporationpablo.org/uploads/1/3/0/7/130739601/3455513.pdf
    • http://laurel-photos.com/uploads/1/3/0/8/130814004/c1025d43cf3e40.pdf
    • http://swtest.godfrey-lee.org/uploads/1/3/0/5/130538833/kazupiniroxeve.pdf
    • http://www.lookingatplants.com/uploads/1/3/0/5/130588809/baluta_bugalibofotafes.pdf
    • http://luxuriouseyesbeauty.com/uploads/1/3/0/9/130969993/7285497.pdf
    • http://newstylemarket.com/uploads/1/3/0/6/130622011/d342d853e7b9a0a.pdf
    • http://mmcarterconsult.com/uploads/1/3/0/5/130545199/fobebilatowa.pdf
    • http://peninsulafilmfestival.com/uploads/1/3/0/4/130475909/libabipem.pdf
    • http://www.feedmypetz.com/uploads/1/3/0/4/130489351/xefojejuw.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_off0000e50e.bin
efe174013a6f6dd1fa9e42e12e9809114092fd9ef3eeb43f88d7d5fb49bac583		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE50E 8116 bytes
font_01_sfnt_off0001044e.bin
6dc6e07f93ae70488a19e8a398a1c6cda2f5723fc3d3cbe180c5afbb10c3611e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1044E 2864 bytes

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