Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6acff3858cdd86c…

MALICIOUS

PDF

54.8 KB Created: 2020-03-29 21:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 03f1c11143336ed8ba9f99440f511332 SHA-1: d79c9c38520b2df2580087a18822c36e6249e30a SHA-256: d6acff3858cdd86c2973297e9a49fa6d9c8fae78767e0a7977919bf3c932f7b4
92 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm attack, embedding numerous external links to other PDF files hosted across various domains. The primary lure appears to be SEO-optimized content, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body contains garbled text and embedded URLs, suggesting it's designed to direct users to a network of malicious or spam-related sites rather than providing legitimate content. No scripts were extracted, and the attack relies solely on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://clucktruckportland.com/uploads/1/3/0/6/130603894/130603894.html#teorema+fundamental+de+derivada
    • http://stuartwhoward.com/uploads/1/3/0/7/130739196/23dee.pdf
    • http://texas5k6pack.com/uploads/1/3/0/5/130539350/xakusotiti_tapiluvasabi_rabokol.pdf
    • http://mullgetsresults.com/uploads/1/3/0/5/130540304/semepulisewuxaxenaja.pdf
    • http://anderstruckinginc.com/uploads/1/3/0/5/130590298/8727020.pdf
    • http://labcharter-pto.com/uploads/1/3/0/8/130814868/pisewelewi.pdf
    • http://centurycityoptometry.net/uploads/1/3/0/8/130813652/puminaxebu.pdf
    • http://shopdanimiller.com/uploads/1/3/0/6/130622080/bobawi.pdf
    • http://valentelawgroup.com/uploads/1/3/0/6/130621959/a3072dbf875806.pdf
    • http://willmonkslighting.com/uploads/1/3/0/5/130546742/sokowoven.pdf
    • http://christianmorgancollection.com/uploads/1/3/1/3/131380604/1128432.pdf
    • http://babygearrentalslu.com/uploads/1/3/0/2/130270917/a2129b0f49b27.pdf
    • http://triatlonboladelmundo.com/uploads/1/3/1/4/131407761/b061a077.pdf
    • http://fc-f�ssen.de/uploads/1/3/0/3/130323573/xidivisuxer_rineb_pijel.pdf
    • http://ciindydoan.com/uploads/1/3/0/6/130603892/2322838.pdf
    • http://dewegvandeziel.net/uploads/1/3/0/4/130475923/nitupigovudin-wexupososepela-nujonaxiki.pdf
    • http://gailedgerly.com/uploads/1/3/0/6/130620927/monuvuwano-tujidusuv-zigolifetuvex.pdf
    • http://prettyclassynerd.com/uploads/1/3/0/6/130621980/zajotaguji.pdf
    • http://mpregobsession.com/uploads/1/3/0/6/130621963/924496.pdf
    • http://bearserviceco.com/uploads/1/3/0/8/130873996/pepuxefopipuworuzon.pdf
    • http://seryjunos.com/uploads/1/3/0/7/130739498/5314612.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087e1.bin
ce11cb10a7097cd65b93514ff0b3c20178812a1eec03f8c04d53158a3f42d691
pdf-font-stream PDF embedded font (sfnt) at offset 0x87E1 9448 bytes
font_01_sfnt_off0000aa89.bin
af820ec08ef91fee9b3eb3e5fba4c3d463ed94d192fc8099fc0cf54c0dfee1a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA89 3172 bytes
font_02_sfnt_off0000b56f.bin
892f6ffec8d3f5378aaf98831fe5328e12a82473175442a49bc1b441016495f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xB56F 16240 bytes