Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55516b568bc20ad…

MALICIOUS

PDF

57.0 KB Created: 2020-04-02 18:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5fef35463df2b75235e77744ddc4093e SHA-1: 6e94c77a1cd9fb0ed9b5d8403a40e6690c6ba1c2 SHA-256: e55516b568bc20ade78039d1a3b15f253817585401b1dacbcc704a3a14de821e
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files. The primary lure appears to be a "J5 usb display adapter driver download". The document's structure and the presence of numerous similar URLs suggest a link farm designed to attract search engine traffic and potentially lead users to malicious downloads.

Heuristics 3

  • 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
  • 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://teshuvah.international/uploads/1/3/0/4/130491253/130491253.html#j5+usb+display+adapter+driver+download
    • http://mlpropertymaintenance.net/uploads/1/3/0/6/130621002/4358926.pdf
    • http://whisperingpinesdaycamp.net/uploads/1/3/0/3/130324092/3775223.pdf
    • http://nadiafarah.com/uploads/1/3/0/5/130545447/3f9716cb6c9.pdf
    • http://textsforteaching.com/uploads/1/3/0/2/130288600/nedisitafapem.pdf
    • http://affordablemediaus.com/uploads/1/3/0/4/130483389/2598880.pdf
    • http://queencityptg.com/uploads/1/3/0/6/130621814/4daa9f28334.pdf
    • http://newtampatraillife.com/uploads/1/3/0/8/130813834/1406375.pdf
    • http://theripsychicmedium.com/uploads/1/3/0/6/130604640/7131386.pdf
    • http://877144107780710590.com/uploads/1/3/1/1/131164270/c68648ec.pdf
    • http://penncrestsenioractivities.com/uploads/1/3/0/3/130323319/xidizutinad-xidal-gakipixamagaj-zorofe.pdf
    • http://dolcinotes.com/uploads/1/3/0/8/130813804/loniropeka-votemelak.pdf
    • http://chrisscowan.com/uploads/1/3/0/3/130324206/9075543.pdf
    • http://rasmussen.center/uploads/1/3/0/6/130604649/witivi.pdf
    • http://bodymattersphysio.com/uploads/1/3/0/5/130551141/nisene.pdf
    • http://menrissul.org/uploads/1/3/0/2/130274267/rolixobixamu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061ba.bin
84e6c4d9bd5dbcf9839a46db00c2e13afdc15d05fef24b4f4c1b85e35ce2e8de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61BA 7196 bytes
font_01_sfnt_off00007dfe.bin
dd79a6eb0812a50901629aeeec423156b083cbc049dfb0d2f2d9695b91144cd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFE 27692 bytes

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