Malicious PDF — malware analysis report

Static analysis result for SHA-256 06826f9e5c239a46…

MALICIOUS

PDF

43.3 KB Created: 2020-04-22 05:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e46469c126123bbcf9deac61763f509f SHA-1: 66fd4cfe9447dd1e6c3bf5ebc2d7d5a6264810ac SHA-256: 06826f9e5c239a46d757961f98935064b364645a2b1ed333b3872e9dbea64606
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine rankings or redirect users to malicious sites. The embedded URL 'http://mansionusa.com/uploads/1/3/0/6/130639017/130639017.html#android+police+scanner+apps' is a primary indicator of this malicious activity. The ML classifier also strongly flagged this PDF as malicious.

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://mansionusa.com/uploads/1/3/0/6/130639017/130639017.html#android+police+scanner+apps
    • http://marybowles.com/uploads/1/3/0/6/130621626/5106081.pdf
    • http://freeburialinsurancequote.com/uploads/1/3/0/6/130604014/somir-liseliluz-kafowod-tasibum.pdf
    • http://shirley-chisholm-nhd.com/uploads/1/3/1/6/131637276/sixujevixi.pdf
    • http://woodsidefund.com/uploads/1/3/0/4/130435646/razirofefe_banis_dutuvenakejefo_guvoxa.pdf
    • http://louisvilleroofingrepair.com/uploads/1/3/0/6/130640094/bejosagef.pdf
    • http://passioncenteredconsulting.com/uploads/1/3/0/9/130969573/lorasijogudeduxiba.pdf
    • http://ravensflight.org/uploads/1/3/1/3/131398194/5900336.pdf
    • http://verycutelingerie.com/uploads/1/3/0/3/130323616/109776.pdf
    • http://gbitechnology.com/uploads/1/3/0/6/130604820/dikodurakik.pdf
    • http://powerplaytigerselite.com/uploads/1/3/0/8/130814280/4733626.pdf
    • http://swanseaskiphire.com/uploads/1/3/0/5/130588188/lorijudevipeliw-gojolonigiju.pdf
    • http://mygaymagic.com/uploads/1/3/1/3/131379536/rixaguw.pdf
    • http://sbcihurtsworkers.com/uploads/1/3/0/6/130604378/cadc486f4f44.pdf
    • http://thegoldenretrieverclubofnswinc.shop/uploads/1/3/0/9/130969889/e491b351.pdf
    • http://marisakirby.net/uploads/1/3/1/6/131606009/kuzim_noxoxer.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076fd.bin
91f61b9010626577021f47b1f3812c4982cff12b89583b013da6db03ac6a23a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x76FD 7844 bytes
font_01_sfnt_off00009589.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9589 2652 bytes