Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f172bfb69ad847b…

MALICIOUS

PDF

40.1 KB Created: 2020-03-11 14:51:20 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ba043089bf7b0c639662490ba82e7595 SHA-1: fe3147e0feb88d14c595424a8c22efef695894d7 SHA-256: 5f172bfb69ad847b81ff966fe91a86d03b5f73cdf6ec3f0d400099e6c90d3667
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified as a "PDF link farm" heuristic. The document body, though partially corrupted, contains a title suggesting a review, likely a lure to disguise the malicious intent. The primary goal appears to be directing users to numerous external URLs, potentially for SEO manipulation or to host further malicious content. No scripts were extracted from this sample.

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://74-123-75-206.mgwnet.com/uploads/1/3/0/8/130813364/130813364.html#dolce+gusto+jovia+pod+review
    • http://www.bastaq.net/uploads/1/3/0/7/130739017/634251.pdf
    • http://www.sailsea.org/uploads/1/3/0/4/130489725/4b5525.pdf
    • http://aim4academicexcellence.com/uploads/1/3/0/8/130815014/lekufuxolezakuwe.pdf
    • http://pietrolesca.com/uploads/1/3/0/4/130483290/7055595.pdf
    • http://caseshopme.com/uploads/1/3/0/3/130323465/luvemoporab-dokalomojogo-doralixun.pdf
    • http://unitedmassmeditation.com/uploads/1/3/0/5/130588315/42aed3fa6d30883.pdf
    • http://realestatelearningnetwork.org/uploads/1/3/0/4/130489051/9861429.pdf
    • http://wicklesscandleco.com/uploads/1/3/0/9/130969795/jaridumeteziti-nevewesile-walejizikenu-nemapetuvuze.pdf
    • http://neonserwis.pl/uploads/1/3/0/6/130605113/bafejogatefago.pdf
    • http://northernvalleysportinggoods.com/uploads/1/3/0/6/130604203/zutafupigoxilonot.pdf
    • http://apolloniacampaign.info/uploads/1/3/0/6/130604441/binafatixebusa.pdf
    • http://newoutsiderart.com/uploads/1/3/0/6/130639905/9844625.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_off000074e2.bin
e3b8ebc38871b80985f7d40a054448c8dfacf3a55efb131f4a7bdb5ba33ddfea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E2 7852 bytes

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