Malicious PDF — malware analysis report

Static analysis result for SHA-256 260b9d1cc25361e8…

MALICIOUS

PDF

52.7 KB Created: 2020-03-23 15:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 911c9a3ead5695fc04d90b11c7dd5cd2 SHA-1: ba40ab91bd72f51436c212364b97715a9c8711af SHA-256: 260b9d1cc25361e85996d36f72dbba1906da214b75bb8180516ab40a5fc8cdb2
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, a technique often used for SEO spam or to direct users to malicious sites. The document body, though partially corrupted, contains text related to 'Ejercicios de enlace quimico resueltos 2o bachillerato' and references the wkhtmltopdf generator, suggesting a lure to educational content. The primary heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, with 'divaformkusadasi.com' being a dominant host. The embedded URLs are likely part of this link farm, aiming to drive traffic to potentially compromised or malicious websites.

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://bestyrecruitment.com/uploads/1/3/0/6/130639656/130639656.html#ejercicios+de+enlace+quimico+resueltos+2o+bachillerato
    • http://divaformkusadasi.com/uploads/1/3/0/5/130551630/33aa6.pdf
    • http://cleaningservicesedm.ca/uploads/1/3/0/6/130604359/4585135.pdf
    • http://truckingsafetycrm.com/uploads/1/3/0/5/130588299/bisotajij.pdf
    • http://www.ransolisprofessionalportfolio.com/uploads/1/3/0/8/130873717/2398655.pdf
    • http://michelziesecke.com/uploads/1/3/0/3/130323532/xuruvuxesefuti-vitavoz-jonezabexo-togovewena.pdf
    • http://montessoricasa.org/uploads/1/3/0/7/130740450/95a37472e93c4.pdf
    • http://tsc-landstar.com/uploads/1/3/0/8/130874205/vonaruvaruxusaxu.pdf
    • http://the4thleveloffinancialfreedom.com/uploads/1/3/1/1/131164131/6345250.pdf
    • http://www.theguamwomensclub.com/uploads/1/3/0/7/130775075/25b1b54.pdf
    • http://ez-pz-pay.com/uploads/1/3/0/6/130621926/7375d5211d.pdf
    • http://liveinpurpose.net/uploads/1/3/0/6/130639683/61b94d238c.pdf
    • http://orabuilt.com/uploads/1/3/0/3/130379367/zisujukapo-lefozapen.pdf
    • http://gaymer.tv/uploads/1/3/0/7/130775762/najejufarufusefemas.pdf
    • http://namedtrust.com/uploads/1/3/0/3/130323186/luxurudekavima_noranasago_pidipuvuf_nibave.pdf
    • http://giteruralenfrance.com/uploads/1/3/0/6/130639603/moxukosi.pdf
    • http://droadllcpa.com/uploads/1/3/0/6/130603888/7718514.pdf
    • http://connecttechnicalservices.com/uploads/1/3/0/2/130271214/senamebato.pdf
    • http://simplyfitfoods.com/uploads/1/3/0/7/130739478/d38cce7e1.pdf
    • http://tanzanyakonsoloslugu.org/uploads/1/3/0/3/130379447/5003810.pdf
    • http://www.vivsvision.com/uploads/1/3/0/6/130621432/8369629.pdf
    • http://nataliekasdan.com/uploads/1/3/0/2/130287873/tekenuwedig_japatiwafit_kobor_balokudi.pdf
    • http://urbanshamanmagic.com/uploads/1/3/0/4/130483728/5ffb1.pdf
    • http://lmprosolutions.com/uploads/1/3/0/6/130603989/beluxaparigoka-bipuworevomaneb-zusadifisadi.pdf
    • http://lmprosolutions.com/uploads/1/3/0/6/130603989/beluxap
    • 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_off00008c09.bin
3557a70f9633a26724a9682463f0c2361ce1fc118151ce6006b5d6891ec701f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C09 7016 bytes
font_01_sfnt_off00009daf.bin
09b30639a6f2764e88040a00310692f9cc32f781fffc3610351acd6ecbc73f85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DAF 10152 bytes

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