Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f22c8e770f6fea1…

MALICIOUS

PDF

63.1 KB Created: 2020-04-02 04:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3ccae4fa0ad1251a1c700e1006106a3b SHA-1: 65c16d2f214db59c1eb2c7b490e96ca85d47d907 SHA-256: 5f22c8e770f6fea1f66f423fced5d6d6a67574b35c365e5b9c9431c4c9f6ee9d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier and contains a large number of external links, indicative of a link farm. The document body, though heavily obfuscated, contains URLs that are likely intended to redirect users to malicious websites. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or host further malicious content.

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://jaxaluminum.com/uploads/1/3/1/4/131437283/131437283.html#soldadura+smaw+gtaw
    • http://blissfulrealtyllc.com/uploads/1/3/1/1/131163514/vodovisewuwof.pdf
    • http://blueridgehighlandgroup.com/uploads/1/3/0/7/130776043/tedirosegaw_saxekiwufizaxav.pdf
    • http://valiulissleepcenter.com/uploads/1/3/0/2/130272847/fe47d00.pdf
    • http://spinalberta.com/uploads/1/3/0/6/130605447/6162215.pdf
    • http://choraleauchoeurdutemps.com/uploads/1/3/1/3/131398285/xezixabuta.pdf
    • http://schoolofbeautytechnology.com/uploads/1/3/0/5/130588277/vepemuf-borenum-laxeguludazene-zazusilazal.pdf
    • http://beheerlinden.net/uploads/1/3/1/1/131164507/70f7480269cc7.pdf
    • http://martinautoplacement.com/uploads/1/3/0/5/130551363/861884.pdf
    • http://gainteriorismo.com/uploads/1/3/0/5/130541131/gifiverogimogefewos.pdf
    • http://dogdayscoffee.com/uploads/1/3/0/6/130603767/256452.pdf
    • http://cherrymarshmallow.com/uploads/1/3/0/6/130621432/sowuzixirenavu-xoxeporowul.pdf
    • http://bobisanerd.com/uploads/1/3/0/2/130291809/aa63971.pdf
    • http://mta-sts.mail.izziemac.com/uploads/1/3/0/5/130551091/ce7dc6.pdf
    • http://romaniatlanta.com/uploads/1/3/0/5/130551245/2844238.pdf
    • http://minnesotafutsalacademy.com/uploads/1/3/0/7/130775400/limoxef-nokegewasowiwew-luvarejugi-fejez.pdf
    • http://thewellseasonedwoman.com/uploads/1/3/0/9/130969726/57118819f.pdf
    • http://rokowooncentrum.nl/uploads/1/3/0/4/130476101/povuponavifo.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_off0000ba80.bin
e2d26e7c61659197e45efe13aa017cbf6423f1909427bc2e7b6386affbb18d2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA80 8164 bytes
font_01_sfnt_off0000d84b.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD84B 16036 bytes

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