Malicious PDF — malware analysis report

Static analysis result for SHA-256 b15cc4c9c41234ed…

MALICIOUS

PDF

46.6 KB Created: 2020-09-18 10:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5f2c57cd9e16edf62f8a761d98b1cb6 SHA-1: ae19d34ab950c1fb4564b28cf16e689727111c55 SHA-256: b15cc4c9c41234ed8d8650cf0bd929159afde74f1eba3479e1fbb5360d815cb3
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that promises a 'clash royale hack apk'. The document body also contains this URL, reinforcing the lure. The presence of a PDF link farm heuristic further indicates malicious intent, likely for SEO poisoning or distributing malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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 https://ttraff.me/wix?keyword=download+clash+royale+hack+apk+latest+version
    • http://migikozo.noanimalpoaching.org/uploads/1/3/0/7/130775990/jusirijufas.pdf
    • http://zaral.ims-spi.com/uploads/1/3/2/6/132696056/2005150.pdf
    • http://files.patrickbohanbooks.com/uploads/1/3/0/9/130969151/juwurudo_zanosufegaxul_vemagotigovu_witimewupavirer.pdf
    • http://files.mcmurrycommunications.com/uploads/1/3/1/8/131872238/wotebowakefi_vifokogavomopij_wasomidanimavud.pdf
    • https://cdn.shopify.com/s/files/1/0430/2487/5674/files/git_readme_example.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/wutowefun.pdf
    • https://cdn.shopify.com/s/files/1/0432/6742/4416/files/74457450305.pdf
    • https://cdn.shopify.com/s/files/1/0459/7055/5047/files/91860644319.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/rrb_allahabad_alp_admit_card.pdf
    • https://cdn.shopify.com/s/files/1/0457/9409/9366/files/authoritarian_leadership_style_of_management.pdf
    • https://cdn.shopify.com/s/files/1/0438/3090/2946/files/beowulf_the_poem.pdf
    • https://cdn.shopify.com/s/files/1/0434/0383/7592/files/42142427325.pdf
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/zavojewawoferurozafub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062e7.bin
4c2c1509d53b48141c0247acaf7e9ced5e2bc9169a956b6cfe4ebd14942832d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E7 5480 bytes
font_01_sfnt_off000075a6.bin
a940a1aa86c00beadd916df3071f906fee30fbb2153c81b980fd03e7ad3b0808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A6 9780 bytes
font_02_sfnt_off00009771.bin
7a8d8a38d607c9bdd80b9913bc08d848e6f19ee61167c2c7551fc905f808dd7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9771 16136 bytes

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