Malicious PDF — malware analysis report

Static analysis result for SHA-256 6221b69a76a623ee…

MALICIOUS

PDF

46.9 KB Created: 2020-08-12 08:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 718e5652acf31b6ec6e2cbedf15d77b5 SHA-1: 2b4666c2ae040fdf75681d7688f877f9c558def0 SHA-256: 6221b69a76a623eec703604b18de901b7936e1ab8004289b33bff0760621ae76
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body also includes a call-to-action phrase and a URL, suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=merubah+file+pdf+ke+jpg+secara+online
    • http://files.wnyccda.org/uploads/1/3/1/3/131380889/92a10cbc91499a0.pdf
    • http://files.sunshinecoastpiano.ca/uploads/1/3/1/6/131607063/4390263.pdf
    • http://files.mtcalvarydetroit.org/uploads/1/3/1/4/131452938/61b6a4e.pdf
    • http://files.southernbredpups.com/uploads/1/3/1/4/131483445/sobexafoxotul_buzufowev_favomewal_fanaronigalip.pdf
    • http://files.tabernacleforashadow.com/uploads/1/3/1/8/131871980/vozoxulebifekone.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1197/3025/files/zewufogewijurunokagur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/tozude.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3641/files/an_introduction_to_agricultural_systems.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/52967038401.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/72380768458.pdf
    • https://cdn.shopify.com/s/files/1/0436/0214/9540/files/random_int_java.pdf
    • https://cdn.shopify.com/s/files/1/0433/8237/4561/files/kubemetojilorakipep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/23445524394.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/jekujusoweguwuxejotixu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5261/files/xaxekaxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0432/1177/files/field_manual_capellan_confederation.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062a8.bin
a7a15be1f9a3317f8eaec5f9cb8ab0a127979455bf5fbba4216b00e1807646d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A8 5700 bytes
font_01_sfnt_off00007612.bin
f5c909b4e17f9d73ec17136209ccecabb99b5ae0f24a7585cfb61a4dd70d2a3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7612 10192 bytes
font_02_sfnt_off00009932.bin
75fb5eda6c80430b94b20cb0daa906e0e98a9f633c3ecfcf71c743d7414a59fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9932 16076 bytes

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