Malicious PDF — malware analysis report

Static analysis result for SHA-256 03fc7b704db4b9c9…

MALICIOUS

PDF

35.6 KB Created: 2020-04-10 06:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9dd2b8ebe83372d8244dfe595b264e1e SHA-1: c54203048a72a4ae7f8a3b807b6d394cfbd3b9ac SHA-256: 03fc7b704db4b9c920a2c159f3fcf9473a54a83abaf18e19b238f4e769b963c1
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm, directing users to various websites. The document body, though heavily obfuscated, contains references to tutorial videos and software, suggesting a lure to disguise the malicious intent. The primary goal appears to be redirecting users to potentially malicious content hosted on the listed domains.

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://mindforyou.org/uploads/1/3/0/5/130550972/130550972.html#indesign+free+tutorials+video
    • http://northcotswolds.com/uploads/1/3/0/7/130775624/167557f.pdf
    • http://swing-time.net/uploads/1/3/0/4/130435848/bfae567b.pdf
    • http://tomluba.com/uploads/1/3/0/9/130969470/5405109.pdf
    • http://ilmedioevoincucina.com/uploads/1/3/0/3/130379118/foguvuzugojibuwoxafo.pdf
    • http://rcmillwork.ca/uploads/1/3/1/3/131380213/dedopixenafadad.pdf
    • http://1000islanddrivingrange.ca/uploads/1/3/0/7/130738730/873866e9fbac06b.pdf
    • http://buyorsellyours.com/uploads/1/3/0/2/130272856/b7364826976c58f.pdf
    • http://adduci.org/uploads/1/3/0/7/130776213/3207607.pdf
    • http://sostenibilidaddelmenor.com/uploads/1/3/1/4/131454696/6220724.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_off000061d6.bin
efb9b3eb69193b07320c63bdca11b98cd0f41a394bf6f6b056c3eb3f459f3606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D6 7868 bytes

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