Malicious PDF — malware analysis report

Static analysis result for SHA-256 684f564378cdcd68…

MALICIOUS

PDF

69.8 KB Created: 2020-08-21 01:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce64432ba34f954daaec9f7db1395521 SHA-1: 0e3f8bdc95e9a961cb91a22936a440e4fa6b1898 SHA-256: 684f564378cdcd68f20833e79592cb8da3f9f3c777fdd6c8145f981c1f195215
162 Risk Score

Malware Insights

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

The PDF contains multiple links, with one identified as a known malicious redirector. The document body includes text and URLs that mimic a download lure, specifically mentioning 'antenatv apk 1.0.5'. The presence of a download button heuristic further supports this phishing attempt. 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.com/pify?keyword=antenatv+apk+1.+0.+5
    • http://files.heartworkbirthservices.com/uploads/1/3/0/8/130813827/xoxufogozo_fupizomazoke_butonafenusu.pdf
    • http://files.stjosephsballymun.com/uploads/1/3/1/4/131454986/d1126.pdf
    • http://files.dript.org/uploads/1/3/1/3/131384208/desafigej.pdf
    • http://files.positiveposturenz.com/uploads/1/3/1/4/131483550/sivaf_polatafi_zuwovil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/95936663901.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/tukukodebogoke.pdf
    • https://cdn.shopify.com/s/files/1/0436/2888/8227/files/monij.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1929/files/paxosomukov.pdf
    • https://cdn.shopify.com/s/files/1/0448/5795/0370/files/kolitis_kronis.pdf
    • https://cdn.shopify.com/s/files/1/0433/7238/0310/files/wogirijinorajumejomobukos.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/76260770284.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/5413314364.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/xokunepiladi.pdf
    • https://cdn.shopify.com/s/files/1/0439/0649/8728/files/filiporiloboxisad.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/kiboxajunaguripan.pdf
    • https://cdn.shopify.com/s/files/1/0432/6395/1003/files/tedadag.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e11.bin
31288899e0e6915d695490ecf75eba4fb36227bdc3f656f7bb3a1a14aadb12f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E11 3068 bytes
font_01_sfnt_off000098d6.bin
c0d2bdae11c40b8ceff1761c42eadd64420564979ef12716450a3b7fcfe3c025		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98D6 4972 bytes
font_02_sfnt_off0000a9e3.bin
7e4ebf315ecc97ad644d8b0f317ac70b7b76cec86a2c140b56f8d66c8f4465d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9E3 8372 bytes
font_03_sfnt_off0000c541.bin
231b93f432b370ffc73f0e2b7d71dcddf554a5520fcb1375e9057082b41e1d22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC541 14668 bytes
font_04_sfnt_off0000f34b.bin
8df704917265b52e6df91784b84a12e09a0accb6f1b10be1ab799ff999003be7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF34B 16380 bytes

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