Malicious PDF — malware analysis report

Static analysis result for SHA-256 38855c5122362a01…

MALICIOUS

PDF

40.6 KB Created: 2020-03-29 13:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8da26d1f23e8d8036141c9a3e869e4f9 SHA-1: 7ca324b8674cec7e00b3ac755154b5929685ca0e SHA-256: 38855c5122362a01ab5b98795fa45a39471efbe0cb3428b3a26a693c06ab5a34
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution network. The document body, though partially corrupted, contains a URL that is also present in the list of external links. No scripts were extracted from this sample, and the primary malicious activity appears to be the redirection to numerous external resources.

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://mx.grandsalinelibrary.com/uploads/1/3/0/7/130739343/130739343.html#suma+de+numeros+binarios
    • http://beescupcakebites.com/uploads/1/3/0/5/130539738/xofabu.pdf
    • http://tiamaryskitchen.com/uploads/1/3/0/9/130969137/f340e0e6774330.pdf
    • http://cleanpro888.com/uploads/1/3/0/9/130969514/3542879.pdf
    • http://ruthannrossart.com/uploads/1/3/1/0/131070331/resazazor.pdf
    • http://paperfreeinventory.com/uploads/1/3/0/8/130813923/kolewu_dovewejenogas_firadumekotusos_dufexex.pdf
    • http://ubc-ibc.com/uploads/1/3/0/5/130543467/mipevip_kusemekoj.pdf
    • http://ivwinterconference.com/uploads/1/3/0/2/130289161/e42b9700.pdf
    • http://safenightsguardianangels.com/uploads/1/3/0/4/130475966/6fd35fb1.pdf
    • http://mssciencefest.com/uploads/1/3/0/4/130476417/mafafatadomig.pdf
    • http://fiammettadeinnocentis.com/uploads/1/3/0/9/130969876/3466145.pdf
    • http://azyriadesign.ca/uploads/1/3/0/2/130272905/sogumolebemi.pdf
    • http://flainsideout.com/uploads/1/3/0/4/130488847/tifivutisaged.pdf
    • http://micheldumont.ca/uploads/1/3/0/4/130477448/pamedefajigej.pdf
    • http://theessentialchemist.com/uploads/1/3/0/4/130483864/noginefas-kuwupotogen-numixowivawi-votati.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_off00006a0a.bin
f354b2e6fe41b0600a55fa15d4faac00a692b668bf68b2a76f070d39866c3a00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0A 8888 bytes
font_01_sfnt_off00008a5b.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5B 2652 bytes

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