Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0f990ba0a351c8…

MALICIOUS

PDF

36.5 KB Created: 2020-03-22 06:26:09 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 71c2bf6434b7912548b26e692628831e SHA-1: d978e582fbcc37b3629fbb85a2e471b32b3b37b1 SHA-256: 7d0f990ba0a351c8159d404cc8e54abe18fda41b3cbe2a334d828a77fb3177cc
62 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to simplifying mathematical expressions and references the wkhtmltopdf tool, suggesting a lure. The primary intent appears to be directing users to a large collection of other PDF files hosted on various domains, likely for SEO spam or to distribute further malicious content.

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://riyasnails.net/uploads/1/3/0/2/130289803/130289803.html#como+simplificar+expresiones+matematicas
    • http://stdo.xyz/uploads/1/3/0/3/130313221/fakutuwekul-tuxisewaxuvi-jigez.pdf
    • http://mosquitosaregone.com/uploads/1/3/0/6/130621210/nomalimesizixavejodi.pdf
    • http://ncarpart.com/uploads/1/3/0/3/130379397/parofiv_zedanimugevuvum_torevinoz_loged.pdf
    • http://hazelandcoco.com/uploads/1/3/0/7/130775279/masuj_vanituvuvus.pdf
    • http://americancleanroomsolutions.com/uploads/1/3/1/0/131070476/7e826e99c4e.pdf
    • http://wcwhair.com/uploads/1/3/0/6/130620573/rinatud-vugonafimofaz-wulovexadajata-xizalogaxireg.pdf
    • http://www.gosolovacations.com/uploads/1/3/0/6/130621351/wexig_gosotukitodu.pdf
    • http://optindeals.online/uploads/1/3/0/7/130775583/1699694.pdf
    • http://lakemuskokarealestate.ca/uploads/1/3/0/7/130740566/464346.pdf
    • http://launchfg.com/uploads/1/3/0/5/130543207/nosumox.pdf
    • http://passionrank.com/uploads/1/3/0/7/130739864/mivusixavutilo.pdf
    • http://mail.dr-mug.com/uploads/1/3/0/5/130550981/7594678.pdf
    • http://bedonetmarmaille.com/uploads/1/3/0/8/130813768/4528355.pdf
    • http://vanentrepot.com/uploads/1/3/0/6/130620653/nabomij.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_off000067ba.bin
c2fed6476617200aabe4afa13ccda5f81d278b5328f79347d39397a3425870d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BA 7888 bytes

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