Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1b73865a898818a…

MALICIOUS

PDF

37.5 KB Created: 2020-03-10 12:05:16 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 43f3df1ed82e839fa0ca58be22a54f89 SHA-1: 9749a8e642db96e120d74d1dfc0b1b63d8f691fc SHA-256: f1b73865a898818ae02edaeda3cfb37bdbd624c7b5849e218208d287ff77adfd
62 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body text, though partially corrupted, includes references to 'Cuestionario ambiente laboral pdf' and 'wkhtmltopdf', suggesting a lure for users to download or view further PDF content. The primary attack pattern involves directing users to a vast array of URLs, likely for SEO poisoning or to host further malicious payloads.

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://taiyangcheng128msc.br3h.com/uploads/1/3/0/5/130588670/130588670.html#cuestionario+ambiente+laboral+pdf
    • http://pitchstock.net/uploads/1/3/0/8/130815664/3037871.pdf
    • http://playpass.net/uploads/1/3/0/7/130739652/nonogovoxeriwe-banago-jejum-wunubibewizu.pdf
    • http://mx.mcdonaldelectrical.com/uploads/1/3/0/4/130436037/lozipuxaxare.pdf
    • http://yustispizzapasta.site/uploads/1/3/0/3/130312919/7a359da.pdf
    • http://mrsbulalangtan.com/uploads/1/3/0/4/130489358/kexipo_muxovoxozuka_pabezujif_sulesesi.pdf
    • http://medschoolcompanion.org/uploads/1/3/0/9/130969726/ganefojowazo.pdf
    • http://transgenderporno.com/uploads/1/3/0/7/130775982/6ea0ef4ea512c.pdf
    • http://www.davidreddickart.com/uploads/1/3/0/8/130874523/fakefejo.pdf
    • http://placegram.net/uploads/1/3/0/2/130271229/begivedokalamo.pdf
    • http://memeology.org/uploads/1/3/0/8/130874059/7e9693ea9.pdf
    • http://mail.taraflyart.com/uploads/1/3/0/4/130435680/duzoxumeloto-juwezutajode.pdf
    • http://www.starburstactivation.org/uploads/1/3/0/5/130551066/2c5f980e0.pdf
    • http://www.evilsupervillain.com/uploads/1/3/0/5/130539871/vobituravuna_sofisezene_nimupizitiz.pdf
    • http://yiechan.com/uploads/1/3/0/5/130551135/9192064.pdf
    • http://thanks.republican/uploads/1/3/0/7/130739928/c4e399.pdf
    • http://pastelvoids.net/uploads/1/3/0/5/130546497/8433770.pdf
    • http://btbsocceracademy.ca/uploads/1/3/0/4/130490928/9495714.pdf
    • http://donttakemysunshine.com/uploads/1/3/0/6/130639869/52f457e5ddcff.pdf
    • http://kateycrews.net/uploads/1/3/0/5/130588518/2599554.pdf
    • http://www.tgsanderson.com.au/uploads/1/3/0/4/130483986/zulajiles_tubupexu_mujinupepebulom_devuw.pdf
    • http://realtybootstrap.com/uploads/1/3/0/6/130620436/a139ecced569.pdf
    • http://shireairconditioning.com/uploads/1/3/0/3/130323968/mesudoripes.pdf
    • http://www.livebake.com.au/uploads/1/3/0/2/130288864/pagokapudilo_pagapu_mulotawogokajol.pdf
    • http://www.livebake.com.au/uploads/1/3/0/2/130288864/pagokapudilo_pagapu_mulotawogo
    • 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_off00006978.bin
dcfd9612a40bcb7b7aa3fe69d58475fa69096634d165dcaf16cbdcd70df1e012		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6978 8376 bytes

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