Malicious PDF — malware analysis report

Static analysis result for SHA-256 efba3cbb7aaef251…

MALICIOUS

PDF

37.6 KB Created: 2020-04-15 14:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5666ca039fa7d8a580c185fdfe0e77d1 SHA-1: 3bf6f0f7177dd210c31de19925a3ceaf13ed6855 SHA-256: efba3cbb7aaef251be8f03e94a18da00a5aaf7c91473bc435d3146307b54e793
62 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to host numerous other PDF files, a common technique for SEO poisoning and distributing malicious content. The primary lure appears to be a fake article about messenger apps, directing users to a URL that ultimately leads to a malicious PDF. The PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external PDF link farm, indicating a malicious intent to distribute further content or redirect users to potentially harmful 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://sunsamurai.com/uploads/1/3/1/3/131384495/131384495.html#best+messenger+app+for+android+tablet
    • http://acecleaningexperts.com/uploads/1/3/0/5/130550817/bakotu.pdf
    • http://votened.net/uploads/1/3/0/7/130740298/zewugafekugu.pdf
    • http://haven4hooves.ca/uploads/1/3/0/6/130605275/joxarojijube.pdf
    • http://livingmetroeast.com/uploads/1/3/0/5/130541004/belodovirokimok.pdf
    • http://sevenfourconstruction.com/uploads/1/3/0/5/130543351/8638130.pdf
    • http://heirloomgardendesign.com/uploads/1/3/0/3/130379458/9073159.pdf
    • http://yogaclothingphotography.com/uploads/1/3/0/8/130873989/xadekisejajunalafaxu.pdf
    • http://kwalpro.com/uploads/1/3/1/4/131454065/647139.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_off00006aa3.bin
f48f41dc9001b64273ecb086bf9e4ca0aa1b2ac57703f507b5959d0899dd61da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA3 7752 bytes

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