Malicious PDF — malware analysis report

Static analysis result for SHA-256 f11fa5fe6caabf5f…

MALICIOUS

PDF

49.2 KB Created: 2020-04-17 22:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 26dbbc093f8d8d8934a81a49a362a089 SHA-1: 8bafaf5057776e3e8a371e87533cfa4b4711e35f SHA-256: f11fa5fe6caabf5fb5e33f73e17418f1a8a302aad626084c643929fc4ce42991
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains that appear to be part of a link farm designed to host malicious content. The ML classifier strongly indicates maliciousness. The primary lure appears to be a 'magazine cover mockup', suggesting a social engineering tactic to drive traffic to the linked URLs, likely for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yaredimmtratax.com/uploads/1/3/1/0/131070382/131070382.html#magazine+cover+mockup+psd+free
    • http://mdview.org/uploads/1/3/1/0/131070859/riduwosunov.pdf
    • http://canbrae.com/uploads/1/3/1/1/131163664/46b2b7.pdf
    • http://tempestharte.com/uploads/1/3/0/5/130540033/winamox.pdf
    • http://hcpens2012.com/uploads/1/3/0/6/130620942/pobemizuxonomolez.pdf
    • http://standers94.com/uploads/1/3/1/6/131606255/sevijebit.pdf
    • http://megustaatelier.com/uploads/1/3/1/3/131379586/2893330.pdf
    • http://progettocasa.studio/uploads/1/3/0/5/130544063/9064845.pdf
    • http://newwavepoolsandspas.com/uploads/1/3/1/4/131454492/1495024.pdf
    • http://owenomandesigns.com/uploads/1/3/0/5/130546096/ee90937f94.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_off000098de.bin
1df3ffe84eaf1d7decaa415c8fd9f58a4ecce0a8e38bccbba67cd1d33f9d1371		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98DE 8488 bytes

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