Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f4892ad8b69d86…

MALICIOUS

PDF

60.3 KB Created: 2020-09-17 10:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16b1ab96e9b834c1e63dac45cbd79627 SHA-1: 35d4726854b2fb17c9c6caf8157a4585d16c8861 SHA-256: 03f4892ad8b69d8657ada5564d80b03e47f528511c2b562ed74075e5f5a8dfc0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=buffy+the+vampire+slayer+season+3+episode+8
    • http://files.fmtls.org/uploads/1/3/0/8/130813466/6687945.pdf
    • http://wijomunuv.nuskin-success.com/uploads/1/3/1/1/131164021/49b6bf544.pdf
    • http://files.theempowermentequation.com/uploads/1/3/1/0/131069764/1aff0dc2ce14b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/24954259422.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/48921533363.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/celtic_script_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/1537/0912/files/fetoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2527/files/bioethics_legal_and_clinical_case_studies.pdf
    • https://57658277-3b66-4a4e-beb8-e4dfcc50d4d1.filesusr.com/ugd/dcc11b_f952e3a9a5534b1b9fb4d90b92ddd8fa.pdf?index=true
    • https://b37ec7df-865f-4720-8cde-e05659a49419.filesusr.com/ugd/8a4248_043a50e10a42485785caa0c87f0d26f9.pdf?index=true
    • https://3c5250a1-7932-431e-a4b8-3d1a26519876.filesusr.com/ugd/d43733_ee2dcfbb1af040bcbde25511ce7f6587.pdf?index=true
    • https://c172520c-da18-49c5-a84a-b29f07c05221.filesusr.com/ugd/43d598_078a0002acb04b37b46dd2546c90c9b2.pdf?index=true
    • https://169d965b-b2cf-46e0-afde-fe13125c24bf.filesusr.com/ugd/f2c1dc_ee3f34adb8cc48daaa2dd1aa6e9d553d.pdf?index=true
    • https://eb295520-c40f-4906-b39c-4f519d284d35.filesusr.com/ugd/70094d_981cc225b4dc4a28b4444a839dbcdb6c.pdf?index=true
    • https://2a948389-e231-436b-af99-154f356ff427.filesusr.com/ugd/843280_81e1812327f9457597270fab8a6874b3.pdf?index=true
    • https://221aee7b-6a9e-4eb7-a6cc-661b0b051edf.filesusr.com/ugd/5bb01c_a3eb8fcec6ee43cbb1b900c41f32cbce.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008335.bin
e21fa874a5ce749122c192e4d7bea0d3d361c07d3a01437f12859fad71908997		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8335 4532 bytes
font_01_sfnt_off000092f6.bin
ba1e94733a10aa279f4bd2af857e40f9aca498b11cc0a4a6fbf211f33f1e6dc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F6 5848 bytes
font_02_sfnt_off0000a6c1.bin
4c84022a9582df0c67a31f0ed57ed03f4b7b21cc72a66d46b3219d217ff0f922		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6C1 10064 bytes
font_03_sfnt_off0000c955.bin
910f10ba59dd00b9107d4c2ece0e6086452e0a1c05a5982153013a5e0012421b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC955 17560 bytes

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