Malicious PDF — malware analysis report

Static analysis result for SHA-256 056207e0c2fa870a…

MALICIOUS

PDF

46.5 KB Created: 2020-03-29 08:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 86ed6ee2b77caa0d3d4f2ed4a97230cb SHA-1: e9fc7dfedc35789b21efb633f89eba4a7758193d SHA-256: 056207e0c2fa870a2634c6efb94e67d3b98ee30f65d08bddffce1b30ccb829b0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs suggests an attempt to redirect users to potentially harmful sites. The document body, though partially corrupted, contains text related to a "Business analysis handbook pdf free download", likely a lure to encourage clicks on the embedded links.

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://2dl6l.bpmtc.com/uploads/1/3/0/8/130813301/130813301.html#business+analysis+handbook+pdf+free+download
    • http://mta-sts.mail.yourworryfreehome.com/uploads/1/3/0/8/130814122/5655590.pdf
    • http://smmcrew.com/uploads/1/3/1/3/131384127/rimapetodilogos.pdf
    • http://amarismedical.net/uploads/1/3/0/2/130271102/fopidogawejogodole.pdf
    • http://renaultlifedesigned.com/uploads/1/3/0/4/130488096/d1a49be0.pdf
    • http://loweryourratetoday.com/uploads/1/3/0/2/130289774/sakiviwadobap.pdf
    • http://lsgreenclean.com/uploads/1/3/0/8/130814631/zujadoxoxuwovam_fijusovogusofev.pdf
    • http://bucketstudios.net/uploads/1/3/0/5/130589219/cfb4658a.pdf
    • http://printsign.se/uploads/1/3/0/3/130379651/cfb74.pdf
    • http://yearbooksghana.com/uploads/1/3/0/2/130272585/pojugepux-mekodepozugiz-vadozibubiza-gijudedarexalog.pdf
    • http://amandamanigault.com/uploads/1/3/0/6/130639757/4183439.pdf
    • http://www.leafrancenewzealand.com/uploads/1/3/0/6/130621153/810960.pdf
    • http://www.shoppingndropping.com/uploads/1/3/0/8/130874645/rexiberav-bodilebena-fupisarigi-bonezir.pdf
    • http://repairitnow.co.uk/uploads/1/3/0/5/130589098/9027730.pdf
    • http://yourwaterfall.net/uploads/1/3/0/6/130621460/rodaka.pdf
    • http://brawlinfo.com/uploads/1/3/0/5/130540493/zekowi_kigur.pdf
    • http://jacquelinegreenough.com/uploads/1/3/0/2/130289551/7a4b93a9.pdf
    • http://michaelanthonytorres.com/uploads/1/3/0/8/130814483/8915202.pdf
    • http://feedinglina.com/uploads/1/3/0/7/130776888/bcb47.pdf
    • http://thethoughtcatcher.com/uploads/1/3/0/6/130604231/farapovetokas.pdf
    • http://latrobestation.com/uploads/1/3/0/5/130588773/bixomonux.pdf
    • http://palangfootball.com/uploads/1/3/0/9/130969904/c4a40c62.pdf
    • http://www.joelleallencounselling.com/uploads/1/3/0/5/130589122/998641.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007804.bin
8aa98d66afea46f22c43b607f16dc7096f130ca46591bf339d687e332bedc8a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7804 8016 bytes
font_01_sfnt_off00009726.bin
b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9726 16036 bytes

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