Malicious PDF — malware analysis report

Static analysis result for SHA-256 b79bce343d71536b…

MALICIOUS

PDF

74.7 KB Created: 2021-05-01 02:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01199127c85026b8e9ad76fac91be0aa SHA-1: 2d45ee09c2228cf89dc58a32ce43b8fb3dab2bf6 SHA-256: b79bce343d71536be4780eb44db22d32cdceb643d4c00266822387addbc68ec4
136 Risk Score

Malware Insights

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

The PDF contains a heuristically identified malicious link pointing to a suspicious URL, which is a strong indicator of phishing or malware distribution. The ML classifier also flagged this PDF with high confidence. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect the user to a malicious site, likely to download a secondary payload or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084563d1f3d1---54416007353.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16086833b5c73c---bepexofevopetovajase.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160788a15b2ca9---fapoxi.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c601ed0e27---monogodegopaneponutaso.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074392a7fe3b---46194217955.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/32837615d8d888d60bd7d3bc9420a405/xagaw.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/8jqo4p1tthq5i6aatk7n77kjt3/70804913777.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/704ikkg9sq7sj8stb8nag8vfl5/22527507600.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2787df1e1---lodupapilubuwex.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/1d941128494ac6af4d8f9c2ca1fe93e3/26300520529.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebefe57334---83502030538.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/32c3cbd8d272fae71ace9bfe46e3f9fa/91215996684.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/027te8qjnb9li0pl906ttl1lj2/88701573311.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607bda868e8ad---63566906508.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607705591cf74---93374412296.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608750a0ead10---8612195919.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/9f02df9982b94a56f2f75d55bb151164/83830537043.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=baal+veer+return+1
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf69.bin
85758738b7dd349f651c2aba434bca9988679c2ce703ec2f798b6dc8f5d8411e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF69 4388 bytes
font_01_sfnt_off0000de5f.bin
b23f9f750bd31e408b84a1ce3cd4c27bd24608833daabc72882d96e50a242d55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5F 10292 bytes
font_02_sfnt_off000101af.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101AF 4324 bytes
font_03_sfnt_off00010fb0.bin
9ebd11c6aeaa3027ed4974ce72125ac3122eac5a93b2b47cf361af00aae7852e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB0 3592 bytes

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