Malicious PDF — malware analysis report

Static analysis result for SHA-256 498c7544f2c86252…

MALICIOUS

PDF

53.2 KB Created: 2020-03-29 01:47:45 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: be88844236b1ff7a7442772703feb36f SHA-1: a39b00a4415db75e7b2f168ae5fec6c88c002d34 SHA-256: 498c7544f2c862526805f3723d8509cac7fccdf685bbef024a560b16838bd434
92 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, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or SEO manipulation tactic, often used to host or redirect to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the specific lure.

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://74-123-77-223.mgwnet.com/uploads/1/3/0/6/130605315/130605315.html#precursores+de+la+antropologia+wikipedia
    • http://overtongateway.com/uploads/1/3/0/7/130775928/c0f71f1f3a3a34f.pdf
    • http://my-urban-boutique-wi.com/uploads/1/3/0/7/130739535/f7276076.pdf
    • http://langnerstormspottinglss.org/uploads/1/3/0/5/130588865/4147237.pdf
    • http://katieskindergarten.com/uploads/1/3/0/6/130621261/e5995d7f02fd49b.pdf
    • http://prestissimopress.com/uploads/1/3/0/4/130488172/sibofuluv.pdf
    • http://lisagumerman.com/uploads/1/3/0/5/130540453/fa17dd.pdf
    • http://sos-brand.com/uploads/1/3/0/5/130550655/boxinonekilu.pdf
    • http://webmail.publichealthmuseum.org/uploads/1/3/0/6/130621218/9682205.pdf
    • http://andershanberg.dk/uploads/1/3/0/8/130814227/dupizumavug.pdf
    • http://shanghaigourmet.us/uploads/1/3/0/3/130324292/fca8d356b27.pdf
    • http://tabletdeveloper.net/uploads/1/3/0/2/130270811/70fda2e89039c9.pdf
    • http://nachothumb.com/uploads/1/3/0/8/130814784/2b91ad3d13b.pdf
    • http://superkickfoundation.com/uploads/1/3/1/3/131398322/77394a9eea0cd7f.pdf
    • http://dieporzellanklinik.de/uploads/1/3/0/4/130435631/wesituxufazineb-suson-rewivimajumefun-pevuxebeteleda.pdf
    • http://demo3.octarinesec.com/uploads/1/3/0/2/130274322/b39ca60dcac.pdf
    • http://quickcatclaims.com/uploads/1/3/0/7/130776175/7960131.pdf
    • http://theladsonline.com/uploads/1/3/0/6/130604072/kebomobetaburozawol.pdf
    • http://simplicityaccountingllc.com/uploads/1/3/0/6/130621084/9679647.pdf
    • http://podgee.tech/uploads/1/3/0/4/130483649/kuxadatigubem.pdf
    • http://healthyeatingandliving.org/uploads/1/3/0/7/130775742/zosobikubezisis_puzosanawiga_bokomaloba_vabututuwina.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_off000084de.bin
09ab36070e6628168d17129ae4696632e5c103944b003cb0ca613d196a7aa912		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84DE 9248 bytes
font_01_sfnt_off0000a65f.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA65F 2652 bytes
font_02_sfnt_off0000afc6.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC6 16036 bytes

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