Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b51ac79e49c742d…

MALICIOUS

PDF

76.5 KB Created: 2021-01-27 19:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 16b3e311709c1a4cca411f925e850b18 SHA-1: bf65a1b4974187e0e29b7c2b3a3e3d5b15f0092f SHA-256: 1b51ac79e49c742d617cea7b89123ab2c51b68af8e5d7289a54bcaa5f67cab58
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a malicious payload or redirect the user to a phishing site. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=southern+red+cedar+tree+florida PDF link annotation
    • https://cdn.sqhk.co/wenegifuteg/2ExHahe/among_us_mod_minecraft_beta.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvapipitol/dgijelN/suzuki_boulevard_c90_service_manual.pdfIn PDF document text
    • http://shop-profildoors.ru/jukisoboxilofasawivugap733xl.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/dihZKif/mujomafetosuxaramewabovo.pdfIn PDF document text
    • http://bigno.space/superbike_rider_wallpaperxy20w.pdfIn PDF document text
    • http://pop-marketplace.ru/bloons_monkey_city_vortex_strategyup85d.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/egdkiJ6/black_christmas_songs_youtube_playlist.pdfIn PDF document text
    • https://cdn.sqhk.co/batovafakupo/Hgd4hdG/9765454009.pdfIn PDF document text
    • http://proba7.xyz/piano_play_magic_tiles_games_appleqf3a6.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/824762270397xdx3.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/B6Ygfhi/41377852699.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/MghD4u9/94227688985.pdfIn PDF document text
    • https://cdn.sqhk.co/velomegu/gjBhflu/78481522111.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zovaner.rf.gd/62798352993.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF104 5032 bytes
SHA-256: 34cd56d570dc3bf1d39c6146ce2ba1c844e7b5becec9b33c66c05d182541f335
font_01_sfnt_off00010217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10217 10176 bytes
SHA-256: ca2465dd2b5616b3d28b6469a4aa4c4f3615980b478bee309cbceb543fabc21c