Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ead2f447bb7928…

MALICIOUS

PDF

37.7 KB Created: 2020-04-09 09:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c26df311444a6431d68cd0a5685e83c9 SHA-1: d5f2b41819b01589ec553384c20239e9404aeebf SHA-256: 16ead2f447bb7928437ac8bcc372ac551d3cde43f4ba47381f7003701cf5c168
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF link farm', suggesting a malicious intent to manipulate search engine rankings or redirect users to potentially harmful content. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate a malicious document, likely delivered as a spearphishing attachment. The document body itself is heavily obfuscated and contains junk data, further supporting a malicious purpose.

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://mccorkleagsales.com/uploads/1/3/0/4/130483295/130483295.html#lee+child+jack+reacher+books+blue+moon
    • http://urbanadventuresquad.net/uploads/1/3/0/8/130874011/bazimor.pdf
    • http://stocktonconsulting.org/uploads/1/3/0/4/130493143/zadore-geliduvudopaj-megifabajuxenox.pdf
    • http://kinseyyoungquistlmp.com/uploads/1/3/0/5/130589297/voxiguxobadurabulev.pdf
    • http://alicetopple-textiles.com/uploads/1/3/0/6/130603822/2184722.pdf
    • http://zylgardening.com/uploads/1/3/0/6/130639607/fumobizanivinotu.pdf
    • http://mobileweldingservice.co/uploads/1/3/1/4/131452991/xejubujete.pdf
    • http://stratoenterprises.com/uploads/1/3/0/5/130551190/709233528092.pdf
    • http://artbygirls.com/uploads/1/3/0/9/130969177/pavunedajonuz-bagod.pdf
    • http://digitalstoryworks.net/uploads/1/3/0/4/130476266/9535641.pdf
    • http://siegelcarecenter.org/uploads/1/3/1/0/131070602/892d68c.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_off00006c15.bin
2703ee408eac10b06ef11615c40a4483730673b2d60383981009ca29aa6944a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C15 7772 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.