Malicious PDF — malware analysis report

Static analysis result for SHA-256 42bafaf987e022c5…

MALICIOUS

PDF

39.9 KB Created: 2020-03-30 13:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4770ddde92fc28bf315ef5352650484f SHA-1: 25484fc4dea89ab2eb77dc5791d81365c98deb8a SHA-256: 42bafaf987e022c5e199d6e9a7627b400ab5475581c0dc6bca362d042b35bd18
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files hosted on different domains. This behavior is indicative of a link farm, likely used to distribute malware or engage in SEO manipulation. The document body text, though partially corrupted, suggests a lure related to educational activities, which is a common tactic for social engineering. No scripts were extracted from this sample.

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://bsa-sccc-pack301.com/uploads/1/3/0/8/130874391/130874391.html#actividades+didacticas+para+ense%C3%B1ar+los+numeros+en+preescolar
    • http://jonardgoldenhand.com/uploads/1/3/0/8/130873943/guponexokiwofibidusu.pdf
    • http://milf-universal.com/uploads/1/3/0/7/130739159/wagokumo.pdf
    • http://mitzvahdesigns.com/uploads/1/3/0/7/130738803/ripivutu.pdf
    • http://misclasesdeespanol.com/uploads/1/3/0/5/130589444/7916849.pdf
    • http://mindhealthconnection.org/uploads/1/3/0/2/130270917/5f86b674b.pdf
    • http://civlirightsreenactor.com/uploads/1/3/0/2/130289320/sakiguwevebozoz_gejakumo_fijunelemi_febupa.pdf
    • http://bbairdrie.ca/uploads/1/3/0/7/130775822/mewelurexoripifapon.pdf
    • http://trevourgglee.com/uploads/1/3/0/9/130969317/db9abc5a3.pdf
    • http://blubloggs.com/uploads/1/3/0/5/130588382/c6f48bdf9.pdf
    • http://foxlanepec.com/uploads/1/3/0/6/130605176/3801931.pdf
    • http://top100christianartists.com/uploads/1/3/0/8/130813401/1927810.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_off000072ba.bin
c8320a0c33effe69e7cfdce804a696e8bfa7afa52fdd8546a91cdaaaad5554a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72BA 7836 bytes

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