Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae4d18519338fe2…

MALICIOUS

PDF

60.9 KB Created: 2020-04-07 20:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 088f9e2791f1ac9df6ea01e198cbf83e SHA-1: e935a26a9ffaf826eca16f5e8144bdbbab39e153 SHA-256: 0ae4d18519338fe215ef0d5ca11fb803c934fc5e9d80ae84fb66cfd8017751ac
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" by heuristics. The document body, though heavily obfuscated, contains a reference to "Tomb kings guide" and a URL that appears to be the entry point to this farm. The presence of numerous PDF links suggests an attempt to manipulate search engine rankings or distribute malicious content through a network of seemingly unrelated websites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://templestoweroofing.com/uploads/1/3/0/2/130289675/130289675.html#tomb+kings+guide
    • http://gordonstounart.com/uploads/1/3/0/2/130288416/jonemu.pdf
    • http://rodrigodebrum.com/uploads/1/3/0/6/130639259/9237926.pdf
    • http://meditatewithprati.com/uploads/1/3/0/7/130775786/kizawutozokiwivaxep.pdf
    • http://bdfpropertysolutionsma.com/uploads/1/3/1/0/131070529/101cab4ac.pdf
    • http://rcwfinancialservicesllc.net/uploads/1/3/0/5/130539866/2938506aaacf3e6.pdf
    • http://onherknees.com/uploads/1/3/0/4/130476074/wujukojimufi.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_off0000c8dd.bin
93aa82bcad1f58790757e6ad9b4d19f4eb854ad758f00d217944184eb6088e23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DD 7824 bytes

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