Malicious PDF — malware analysis report

Static analysis result for SHA-256 860822d9a8cafc8d…

MALICIOUS

PDF

40.3 KB Created: 2020-05-14 07:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ddb2ca1c2cc638da2e359e03d8092604 SHA-1: 290794a29079d25d1065fa4d6a161a045c27486b SHA-256: 860822d9a8cafc8d3280f6d72b668f878ac9c65b66532a265b9c4365a32e964d
104 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or redirecting users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a malicious intent to distribute content or malware. The presence of an embedded URL and a 'download button' lure further supports this, likely leading to a second-stage download or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://thesouppedlars.london/uploads/1/3/0/5/130588478/130588478.html#alarm+clock+app+free
    • http://belleandbeaucompany.com/uploads/1/3/0/7/130740616/5333912.pdf
    • http://chinatonorthamerica.com/uploads/1/3/1/8/131856158/tonoxezajani.pdf
    • http://reshafe.com/uploads/1/3/1/6/131606674/72904bc1.pdf
    • http://thedrakebareugene.com/uploads/1/3/1/0/131071114/pebiruminudoxad_giwezujokitet_lowololo_xasugibam.pdf
    • http://correctivecare.org/uploads/1/3/0/5/130589140/lepuxadijubewag.pdf
    • http://mahaliabamfordfoundation.com/uploads/1/3/1/4/131438582/guzuxigewu.pdf
    • http://mountaingalsbookkeeping.com/uploads/1/3/0/6/130604306/wuxigevitama.pdf
    • http://businesssupport.solutions/uploads/1/3/1/0/131070501/kujagoso-tewamitujaxafit.pdf
    • http://strategicfounderpodcast.com/uploads/1/3/1/4/131482892/3735506.pdf
    • http://placeofthefuture.co/uploads/1/3/0/8/130815026/aa1d88339968a54.pdf
    • http://babycoffeeshop.com/uploads/1/3/0/8/130814168/498741.pdf
    • http://bexarwomenvoteblue.com/uploads/1/3/0/6/130621695/pefoxunubo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073de.bin
715561b8ef1b5454f2199920d252bcab68404b03db745e3f1f498ae639ce5bdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DE 10256 bytes

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