Malicious PDF — malware analysis report

Static analysis result for SHA-256 000c93e28732ed29…

MALICIOUS

PDF

57.9 KB Created: 2020-08-29 13:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e8f3eabda45892015100eb2d7bff77a SHA-1: 93ea8c94afbcbaf94f8765d1059cabf98cc2e66a SHA-256: 000c93e28732ed298db3f1feb254435a855251ce6fc3a77a04aa8e80dce986ba
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to a URL that is part of a link farm. The document body, though heavily obfuscated, contains text related to a 'Kenwood kdc 252u wiring diagram' and the malicious URL itself, suggesting a lure to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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.ru/wix?keyword=kenwood+kdc+252u+wiring+diagram
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4703/3752/files/nilijadedozufizemuwabapot.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/english_words_meaning_in_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3563/files/52874649484.pdf
    • https://cdn.shopify.com/s/files/1/0432/8377/5643/files/30100560542.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/hambriento_nach.pdf
    • https://cdn.shopify.com/s/files/1/0437/5976/3617/files/mac_resert_trial_photoshop.pdf
    • https://cdn.shopify.com/s/files/1/0449/9508/4456/files/68280016440.pdf
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/athar_aamir_khan_upsc_marksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/william_finbar_kennedy.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/wemoxemedawipirepi.pdf
    • https://cdn.shopify.com/s/files/1/0441/2994/3704/files/zeburadoroxaduboru.pdf
    • https://cdn.shopify.com/s/files/1/0438/0311/5682/files/latest_consumer_reports_tv_ratings.pdf
    • https://static.usrfiles.com/ugd/b8c837_56a2082fa5534f109682c165d8792389.pdf
    • https://static.usrfiles.com/ugd/b8c837_da4d4ae52d7941bdb4a5f76737f27e19.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd8519c171fa453ab5508dc59ce0c169.pdf
    • https://static.usrfiles.com/ugd/b8c837_19bf628f17bd479e96ab3a433509fdc4.pdf
    • https://static.usrfiles.com/ugd/b8c837_fded61b4a0f74705b95d29c1c5064f73.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ff4.bin
e7c06a0dc481494621a4847731f779ae7df0c404639b109f48eaaf73bcaa6cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF4 3036 bytes
font_01_sfnt_off00009abe.bin
a93aa8c38b838162c947df9b4dcd1e23edb7fb50ff5857565a448c4577a501a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABE 5432 bytes
font_02_sfnt_off0000ad39.bin
5ef4c06e00011d830494e1f887c186631b22e66e337d4d789427f974d3c53e9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD39 14328 bytes

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