Malicious PDF — malware analysis report

Static analysis result for SHA-256 67714733869af54d…

MALICIOUS

PDF

52.5 KB Created: 2020-03-24 19:53:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 44f37bda431d67e754fc283eaa4d7ebf SHA-1: 101ce0999a753ee931ea8e288166130516b2692b SHA-256: 67714733869af54d0aecf5a70e38d29fc5ccb0304557686c592f69ffa3811bcd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or distribution mechanism. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs supports this assessment. The document body appears to be obfuscated or corrupted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://johnsonandsonsservices.com/uploads/1/3/0/5/130588927/130588927.html#el+mito+de+saturno+devorando+a+su+hijo
    • http://umbrellasup.org/uploads/1/3/0/3/130313783/fixawedeze.pdf
    • http://gkbhat.com/uploads/1/3/0/5/130551543/8134229.pdf
    • http://mingyiliu.me/uploads/1/3/0/4/130483248/nizusufesaxugewu.pdf
    • http://huntedconnections.shop/uploads/1/3/0/2/130291523/kibepu-dekigurok-nodawiranamukod.pdf
    • http://topfinesserapparel.com/uploads/1/3/0/3/130323767/tosevawufex_gomixan_zadijufebefu.pdf
    • http://intersexautonomy.org/uploads/1/3/0/7/130740072/lodimemazi_midevi_bonuzowom.pdf
    • http://fixmyfella.com/uploads/1/3/0/6/130639410/rigoxolasefagifozara.pdf
    • http://www.impropisation.com/uploads/1/3/0/4/130488227/81025e.pdf
    • http://chelseachessclub.com/uploads/1/3/1/0/131070394/bolijivodopuxe.pdf
    • http://northcoastfoodtours.com/uploads/1/3/0/7/130738946/3862938.pdf
    • http://www.3pfd.com/uploads/1/3/0/5/130551962/9818544.pdf
    • http://sbcustomapparel.com/uploads/1/3/0/7/130740066/837927090d39.pdf
    • http://sheffieldcomingsoon.com/uploads/1/3/0/5/130588433/vabigoli-nawoborajez-zakejikegeviw-karidiwad.pdf
    • http://theeduduo.com/uploads/1/3/0/3/130323302/ludumidusijedojevo.pdf
    • http://northstarmedics.com/uploads/1/3/0/5/130543279/bbcd5a6291f0684.pdf
    • http://hivemindbrewing.com/uploads/1/3/0/5/130588548/ririsemutil-sobatowodukibum-bajadaripe.pdf
    • http://www.travelwithpapino.com/uploads/1/3/1/0/131070006/dbb880f.pdf
    • http://bluefireindustrial.org/uploads/1/3/0/8/130813846/384258.pdf
    • http://www.bimaristan.org/uploads/1/3/0/3/130312996/gogadijurusor-wesotomav-widenemosi.pdf
    • http://michaelsroofingco.com/uploads/1/3/0/3/130313748/lozafuzagometoro.pdf
    • http://powerlazer.party/uploads/1/3/0/5/130551325/6658994.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000819c.bin
52a88b2bea33e561909cc9ec9d9a9f040b5ba9c3c943bfb2c6f35cfc2ed2057d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x819C 9664 bytes
font_01_sfnt_off0000a39f.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA39F 2652 bytes
font_02_sfnt_off0000ad06.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD06 16036 bytes

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