Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff14892b18d78aec…

MALICIOUS

PDF

58.9 KB Created: 2020-03-28 14:06:58 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 01b3966008d14bdaccfab1422b3b442e SHA-1: d23408ad43e3939dc2c0d5c24ef05b49f01b9ec6 SHA-256: ff14892b18d78aec2b2c192c27246fbcc3ba6d295f94ff981df3feb2f5c1136f
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on various domains. This pattern is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ML classifier strongly supports the malicious nature of this document. No scripts were extracted, and the document body is heavily obfuscated, but the presence of numerous external links is the primary indicator of malicious intent.

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://insurewithhoward.com/uploads/1/3/0/2/130288317/130288317.html#que+es+un+relleno+sanitario+unam
    • http://samthinks.com/uploads/1/3/0/6/130639462/xezil_wajopuweku_tupixuvurasiwo_wesof.pdf
    • http://gr8soundslearning.com/uploads/1/3/0/5/130589238/punadefesig-jowifase.pdf
    • http://www.4eyesdesignz.com/uploads/1/3/0/2/130289480/7804868.pdf
    • http://sweetsheilastreats.com/uploads/1/3/0/7/130740298/f1e430a.pdf
    • http://food.work/uploads/1/3/0/6/130639966/todadiwateko.pdf
    • http://babyak.net/uploads/1/3/0/5/130551896/25fb7a55825490.pdf
    • http://www.pilgrimsandprodigalscom.com/uploads/1/3/0/4/130435893/folom-tizimod-gelowa.pdf
    • http://thestorycollective.com/uploads/1/3/0/7/130739892/81793dc19.pdf
    • http://mta-sts.mail.bhdesignstyle.com/uploads/1/3/0/4/130488539/firolezujaxeluxisi.pdf
    • http://cpanel.rajeevlehar.com/uploads/1/3/0/6/130621808/e728ce5.pdf
    • http://ruggedboutique.com/uploads/1/3/0/4/130476216/8621392.pdf
    • http://probuscurrimundi.com/uploads/1/3/0/7/130739177/155427.pdf
    • http://www.acupunturavetbarcelona.com/uploads/1/3/0/7/130739904/keronodidamigupapul.pdf
    • http://alexcog.org/uploads/1/3/0/6/130603692/7784988.pdf
    • http://learnvibe.com/uploads/1/3/0/6/130639980/a9ee9c85c493.pdf
    • http://christianwomenie.org/uploads/1/3/0/8/130813509/5846182.pdf
    • http://bouldercbd.org/uploads/1/3/0/5/130545173/pijedadi_pepum.pdf
    • http://theyachtracingpodcast.com/uploads/1/3/0/6/130639140/mukofoviteselujopo.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_off0000b1f0.bin
d0ae6ebfccf284f19c1b1d0569666b903a8d772ef3548a8a4b10b5b01fcb6634		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F0 9064 bytes
font_01_sfnt_off0000d276.bin
83d89f79375f7f339e88070a8779324ce221c94923bff415e388e162fbc46cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD276 2604 bytes

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