Malicious PDF — malware analysis report

Static analysis result for SHA-256 1beb3c8b1f31ab23…

MALICIOUS

PDF

44.9 KB Created: 2020-04-11 01:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 883b82ab0a11b18039ec1bf7186f6e38 SHA-1: ef2e454419c5b94d68d3686c5aff1b5029afba48 SHA-256: 1beb3c8b1f31ab235737ff41e20f6788f956d8188974a2738a40eae2c6f40554
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 to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. No scripts were extracted, and the document body is largely unreadable binary data, making it difficult to determine the exact payload or intent beyond the link farm. The primary attack pattern observed is the mass distribution of external links.

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://74-123-76-60.mgwnet.com/uploads/1/3/0/4/130476572/130476572.html#fisica+general+bueche+serie+schaum+pdf
    • http://img-q8.com/uploads/1/3/0/5/130589145/zuxodosoxej.pdf
    • http://mkequiltingco.com/uploads/1/3/1/4/131438233/74d6d.pdf
    • http://juliewhitbyyoga.com/uploads/1/3/0/6/130605388/lukafusozotewaruvek.pdf
    • http://treesrollingpapers.com/uploads/1/3/0/7/130739897/mikeveraf.pdf
    • http://metalfinished.com/uploads/1/3/0/5/130589286/nipewafene.pdf
    • http://shelleybeard.com/uploads/1/3/0/2/130291030/5444932.pdf
    • http://stolenjustice.net/uploads/1/3/1/3/131379183/makepexunaweg.pdf
    • http://janovelo.com/uploads/1/3/0/6/130639682/tubixukotaw_rabef_bepitisetep.pdf
    • http://bauercraft.com/uploads/1/3/1/1/131164460/b2377c5a7896.pdf
    • http://giuseppesabino.com/uploads/1/3/0/5/130539726/musozezoludanawiw.pdf
    • http://burningbushshirts.com/uploads/1/3/0/7/130738974/wukorena-zoxujipumon-wimaronime-ferupipuxosunug.pdf
    • http://nicheconsultingservices.com/uploads/1/3/0/7/130776655/63c7e5273e7b8.pdf
    • http://cannononlinemarketing.com/uploads/1/3/0/2/130288427/gidatomemuf-sireme-taxaludumudol.pdf
    • http://oliviagren.com/uploads/1/3/0/9/130969596/2e18802d32.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_off0000865e.bin
445fad014a4a212b47829bde9698cf488bb99d99edba51bf00fb9ccca36d31b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x865E 9088 bytes

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