Malicious PDF — malware analysis report

Static analysis result for SHA-256 893b9a4b93220991…

MALICIOUS

PDF

141.0 KB Created: 2020-06-05 05:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cb21323773fa7495771718fe7008ca8 SHA-1: 461340fd5d1f4e69e0d20c032f490ddfb54acec9 SHA-256: 893b9a4b93220991df76ee5f115cbfb437cf269192260adcb13860477bfe8330
104 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with a significant number pointing to potentially malicious domains. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a reference to 'Terraria items cheaten' and a URL, suggesting a lure to a malicious site. The presence of many external links and the ML detection indicate a high likelihood of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://path2.health/uploads/1/3/1/6/131606092/131606092.html#terraria+items+cheaten
    • http://handyindeed.com/uploads/1/3/0/5/130589261/karomevomipa_vobaj_guzepukusu.pdf
    • http://70-141-74-228.monroeinfo.com/uploads/1/3/0/7/130739399/bupasa.pdf
    • http://tiffanyharrisonhome.com/uploads/1/3/0/7/130775023/kijibesogaximup-nefuna-zomadufub.pdf
    • http://laracroydon.com/uploads/1/3/0/6/130604931/tesudirumujide-sarax.pdf
    • http://trsthompsonrailservices.com/uploads/1/3/1/1/131164293/belevosogeruges_kolukuwosujome_tulatixub_rujapo.pdf
    • http://cloud12apps.com/uploads/1/3/1/4/131453370/ginefoxazodez.pdf
    • http://path2.health/uploads/1/3/1/6/131606092/terms.html
    • http://path2.health/uploads/1/3/1/6/131606092/dmca.html
    • http://path2.health/uploads/1/3/1/6/131606092/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://sunederaxi406707068.files.wordpress.com/2020/06/54570067673.pdf
    • https://deriwekula.files.wordpress.com/2020/06/nibuwafoku.pdf
    • https://muwomud44121088.files.wordpress.com/2020/06/wubutusa.pdf
    • https://suvirowom.files.wordpress.com/2020/06/wumunowuk.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001eca2.bin
642831311e04d92077d53b0e41500918118aef1f331d6cd3ad0c2a8378ac3b9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1ECA2 5064 bytes
font_01_sfnt_off0001fe3b.bin
2b9c9c3a2c130ad56296540480720ab4e27d0d33eb35eb19e9fbb97971bce92a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE3B 12144 bytes