Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc87d930f807569c…

MALICIOUS

PDF

43.9 KB Created: 2020-04-11 07:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d07878965aced7859c76da6e63811ff7 SHA-1: 789037eba753f40c2a73f03106663b66f496af96 SHA-256: dc87d930f807569cf5fba4d2215662ae64fef25897299a833d78451623891bb1
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many pointing to numeric slugs on various domains, indicative of a link farm or SEO spamming technique. One of the embedded URLs, http://texasfinesse.com/uploads/1/3/0/6/130604161/130604161.html#je+te+veux+sheet+music, is presented as sheet music, suggesting a lure to disguise malicious intent. The ML classifier 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://texasfinesse.com/uploads/1/3/0/6/130604161/130604161.html#je+te+veux+sheet+music
    • http://hospicehearts.org/uploads/1/3/0/2/130292073/gegazanadanufup.pdf
    • http://jeremythecreative.com/uploads/1/3/0/7/130776319/simozetolubo.pdf
    • http://spotlightperforming.com/uploads/1/3/0/4/130477890/05200cf1c.pdf
    • http://arcosoffice.com/uploads/1/3/0/6/130639456/metiboxabe_fewevop_zuzax_wefetune.pdf
    • http://diablopepperfarm.com/uploads/1/3/0/6/130621282/4145739.pdf
    • http://behdaar.org/uploads/1/3/0/2/130272478/volevikexej.pdf
    • http://savvyunipay.com/uploads/1/3/0/5/130545627/29bf146642682e.pdf
    • http://doverorchestra.com/uploads/1/3/1/3/131379029/2d0a6b06.pdf
    • http://couzinfilms.com/uploads/1/3/1/4/131453595/fatobepa.pdf
    • http://internationalcff.com/uploads/1/3/0/2/130289749/nolaposilu.pdf
    • http://greeneaglellc.com/uploads/1/3/0/6/130639886/d175479db.pdf
    • http://thechristinaleavenworth.com/uploads/1/3/0/6/130603810/51ee232.pdf
    • http://povertytopowerhouse.com/uploads/1/3/0/6/130604188/9212517.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_off0000711b.bin
0dd0fc200a2ed8d21cf4d1648edf93a7951a1b7cfd5e8cabfad60cb95b6ba49c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x711B 9232 bytes
font_01_sfnt_off00009406.bin
d7821087a352d629924ad76990f4de176c442101984e483df451d6a3024dce92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9406 4904 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.