Malicious PDF — malware analysis report

Static analysis result for SHA-256 21acbf7a1a14526d…

MALICIOUS

PDF

39.6 KB Created: 2020-04-03 03:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c6f0bc894587e858ac0bfc4f2ec259de SHA-1: 8db300e88f977864bf1300b73c639a5e4a3e2714 SHA-256: 21acbf7a1a14526d4b770b83a0d776b6c4559c6de3fec2196cb2a974efbde9f3
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, a technique commonly used to direct users to malicious websites or download further malware. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm designed to manipulate search engine results or distribute content. The document body, though heavily obfuscated, contains references to URLs that are also present in the heuristics and URL list.

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://ueeservices.info/uploads/1/3/0/2/130289564/130289564.html#the+gender+game+movie
    • http://lahjitmusic.com/uploads/1/3/0/9/130969925/91188609e7b73.pdf
    • http://thebackwardvendor.shop/uploads/1/3/1/4/131453520/4863995.pdf
    • http://twintreescowboygear.com/uploads/1/3/0/4/130476468/6262942.pdf
    • http://supervisors.dk/uploads/1/3/1/1/131164027/53c85449f5.pdf
    • http://10daycreditboost.com/uploads/1/3/1/4/131410009/0dfb72558b.pdf
    • http://the420artclub.com/uploads/1/3/0/7/130776436/livezufowagugeb_befedafule.pdf
    • http://spiritstrongfitnessstudio.com/uploads/1/3/0/5/130547215/104376a746.pdf
    • http://lauraboribayona.net/uploads/1/3/0/6/130621020/sejedolefesesiruzux.pdf
    • http://hmsincatl.com/uploads/1/3/0/6/130603828/1360a.pdf
    • http://uptownvisioncenter.net/uploads/1/3/1/3/131379478/gedomonizofax_joxedosejosew_rozufip.pdf
    • http://polanduncorked.com/uploads/1/3/0/8/130814208/49185.pdf
    • http://bluesundayinc.com/uploads/1/3/0/6/130621206/jugupovup-wobavoj-pubeb.pdf
    • http://briangonerogue.com/uploads/1/3/0/3/130379777/67fb3541a67f0.pdf
    • http://us30strategy.com/uploads/1/3/0/3/130324030/jegodu.pdf
    • http://shampoochesbt.com/uploads/1/3/0/8/130813837/tolojawedafodev.pdf
    • http://gitanabeauty.com/uploads/1/3/0/7/130739294/narorum_wuzuvuniribali_nawize.pdf
    • http://dad2mom.org/uploads/1/3/1/4/131406930/lututeved.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071b0.bin
927049ccd230112157c86d8476bc12dfe17a2542d0c18dfbace9a7fb49214324		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B0 8260 bytes

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