Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d873c637d808e7…

MALICIOUS

PDF

43.5 KB Created: 2020-04-06 06:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 571bae7a920099ced6193e15ba814438 SHA-1: 95e38b35cafc11dacdda72229db9cad76c42c9bd SHA-256: a8d873c637d808e7fdd3a6333dab08245722f2718fcb94688dc243c897a0d84c
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to various domains, many of which appear to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a tactic to generate traffic or distribute content across multiple sites. The document body, though partially corrupted, contains a URL that aligns with the detected link farm pattern. The primary intent appears to be directing users to this network of sites.

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://adoptme.info/uploads/1/3/0/5/130539105/130539105.html#margen+para+decorar+una+cartulina
    • http://helpfuleditor.com/uploads/1/3/0/7/130775274/zunebadax-vivavaganoje-bimog-tijasek.pdf
    • http://casitacameo.com/uploads/1/3/0/6/130603928/tepivosur.pdf
    • http://100caloriecompany.com/uploads/1/3/0/3/130323130/busogevijediwi_ruwakujufuben_paboguxixaru_gumido.pdf
    • http://behavioral-health.solutions/uploads/1/3/0/7/130776629/waleseram.pdf
    • http://mediterranemtbchallenge.com/uploads/1/3/0/8/130814234/6242027.pdf
    • http://eftshiatsu.com/uploads/1/3/1/1/131164366/44845.pdf
    • http://justinalfond.net/uploads/1/3/0/7/130775707/dunokomuwewox-tepezufuvimog.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_off000069b1.bin
f2e3fc3ffb4230cb58bc6a264e8df5fc096f3bc4fc4953dd5fb95482ae2b7ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B1 9060 bytes
font_01_sfnt_off00008a7b.bin
bb7f3a77f7833b39fe6b0cf08265a5ad0460cb4bda91382e6c877c0db3ce514d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7B 16164 bytes

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