Malicious PDF — malware analysis report

Static analysis result for SHA-256 413b0c03ae280903…

MALICIOUS

PDF

42.8 KB Created: 2020-04-03 07:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b5cfffaad6af9cd901180c56ba81b3f4 SHA-1: 2cfab1f1cc24620a363d06a6f0be586d0512005d SHA-256: 413b0c03ae28090374c489ed789e91014dbee58ccb8d0d00c1082b6734d7a6f3
92 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, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though partially corrupted, contains references to some of these URLs, suggesting a deliberate effort to create a link farm. The primary purpose appears to be SEO manipulation or potentially distributing further malicious content through these numerous 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://mindstrikecreative.com/uploads/1/3/0/6/130605237/130605237.html#aplicaciones+de+la+regla+de+la+cadena+ejercicios+resueltos+pdf
    • http://ambercove27waterfalls.com/uploads/1/3/1/4/131406528/c2dd60f7343bb1.pdf
    • http://globaltradematters.net/uploads/1/3/1/1/131164117/polumukive-felivex.pdf
    • http://thegoodloanbroker.com/uploads/1/3/1/3/131383464/3648604.pdf
    • http://cqcustomdesigns.com/uploads/1/3/0/8/130814252/1833092.pdf
    • http://winchesterunited.ca/uploads/1/3/1/3/131382536/5381562.pdf
    • http://hgfnow.com/uploads/1/3/0/6/130622091/5717131.pdf
    • http://thesacredpath.co/uploads/1/3/0/2/130270955/3d4b2b894ee0e.pdf
    • http://maderas3c.com/uploads/1/3/0/2/130289406/samunagekunet_bozixovil.pdf
    • http://onestepforwardinspirations.com/uploads/1/3/0/8/130813818/dodowejizetelisese.pdf
    • http://danielmegara.com/uploads/1/3/0/6/130620712/8190157.pdf
    • http://mulberryonfisher.com/uploads/1/3/0/6/130639863/wipupibapexir.pdf
    • http://rpahomerepairs.com/uploads/1/3/1/4/131438308/borepabiluwubufasoga.pdf
    • http://kitchenandcraftevents.com/uploads/1/3/0/2/130288329/ec396c69.pdf
    • http://08bbf7.com/uploads/1/3/1/0/131070656/2014338.pdf
    • http://platosquest.com/uploads/1/3/0/3/130323538/wevuvuxaziwamazosil.pdf
    • http://pennigbuettel-aktuell.com/uploads/1/3/0/2/130271161/dusufegedik-waxuzule.pdf
    • http://newseynessa.com/uploads/1/3/0/5/130539912/bupigi_salotufenu_superomuw.pdf
    • http://cedarbendavon.com/uploads/1/3/1/0/131070173/lugiwodoxobedakuxewe.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_off000074fe.bin
bec3f42c64d674ed87c8aa7fa2680aa480665950073e93a100966f7c8dcf43e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FE 10632 bytes

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