Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca2400ad0be18b8…

MALICIOUS

PDF

84.3 KB Created: 2021-03-22 02:43:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 872ad65a1e7f4474603a360623da19de SHA-1: ddb39a854a860db481429556b63e957aa01b74bb SHA-256: 9ca2400ad0be18b8d0c49012162a641f6f64570b452b6c0ca8dfb6f99e907920
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, directing users to potentially malicious websites. The document body, though heavily obfuscated, contains references to 'cracked netflix apk 2019', suggesting a lure for illegal software downloads. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://pelibifir.ru/123?utm_term=cracked+netflix+apk+2019
    • http://kefets.xyz/audio_technica_at-lp120xusb_reviewhzf5z.pdf
    • https://cdn-cms.f-static.net/uploads/4481058/normal_603e8b6bc7320.pdf
    • https://cdn-cms.f-static.net/uploads/4403531/normal_5fd26149b6b90.pdf
    • http://morj.space/59491081799ghsxi.pdf
    • http://xojuxelase.medianewsonline.com/gevepezexi.pdf
    • https://cdn-cms.f-static.net/uploads/4403260/normal_601fe9fd0c03f.pdf
    • https://lewotivegil.weebly.com/uploads/1/3/4/3/134320996/63283652f43dc8f.pdf
    • https://cdn-cms.f-static.net/uploads/4408471/normal_60510ba2ce30b.pdf
    • https://gawokuvaz.weebly.com/uploads/1/3/4/6/134656265/kexow.pdf
    • http://cyberghost.store/pudeligoxa7tcs.pdf
    • https://gonibulurigudum.weebly.com/uploads/1/3/0/8/130874364/c0e243a.pdf
    • https://static.s123-cdn-static.com/uploads/4421464/normal_5ff944dce5cfe.pdf
    • https://static.s123-cdn-static.com/uploads/4376625/normal_5ffbce3bf13f4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bodegifu.atwebpages.com/pijetawanaxuxa.pdf
    • https://s3.amazonaws.com/jotizifime/wokizewafofegaduwogo.pdf
    • https://s3.amazonaws.com/mojivikapeti/hospital_linen_bed_sheets_in_india.pdf
    • https://s3.amazonaws.com/kagedatabujo/xatazifirejorewunija.pdf
    • http://xuvekixofeku.onlinewebshop.net/jonipogovi.pdf
    • https://s3.amazonaws.com/vobuturinivi/43437735019.pdf
    • https://s3.amazonaws.com/kabisebax/momefamax.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e598.bin
408a82c0db9eacb80d95d72fe974496eb8dac6677069e212cfb5ca9ee500e983		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 5492 bytes
font_01_sfnt_off0000f857.bin
eff84d7eb97eac7661ae2452e2199bf4d29eb5583fe5e911e211a65b47743a3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF857 2920 bytes
font_02_sfnt_off000104ca.bin
d0947eaee8874589920611f1b573a2297561b3a66f674c5420f76c6a8bc94641		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104CA 11192 bytes
font_03_sfnt_off00012b1e.bin
e2a9c81e5336f2cf7624f6a08a939f4eed21b86ed89778ed89eb17ac4be11dad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1E 16720 bytes

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