Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22b7d72717bde14…

MALICIOUS

PDF

70.9 KB Created: 2021-02-13 11:12:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2098f53ec21a9b3e8a1a664f00eb343 SHA-1: 9f48e1e569696c6f92ac4b1fe4b31f635456f02c SHA-256: a22b7d72717bde14496e4efd098bb6ddd1f7b8ef871f5f431c6bcc9be8657445
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of links, suggesting a malicious intent to redirect users. ClamAV detection and ML classification further support its malicious nature. Although no scripts were explicitly extracted, the presence of external links and the PDF structure suggest it's designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-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://bologen.ru/wix?keyword=sonic+adventure+battle+2+chao+guide
    • https://muwalivom.weebly.com/uploads/1/3/2/6/132695892/menaf.pdf
    • https://static.s123-cdn-static.com/uploads/4426263/normal_600087c52f658.pdf
    • https://cdn.sqhk.co/xonivozew/jiSgfyM/92753619639.pdf
    • https://forupiwiwipugo.weebly.com/uploads/1/3/5/3/135349306/a1b605fe.pdf
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/xonadagi_nevamolefaxeveg_kuterusa.pdf
    • http://momentshop.website/jisewodedibeznzor5.pdf
    • https://cdn.sqhk.co/rufosopufu/jcwjhht/tangled_2_full_movie.pdf
    • https://cdn.sqhk.co/xogovofofi/b6Cihjb/space_flight_simulator_mod_apk_download_android_1.pdf
    • https://cdn.sqhk.co/denidugabuni/hcNeMvP/39034741677.pdf
    • https://cdn.sqhk.co/pofadugilip/hhtjdih/vojosugadozir.pdf
    • https://cdn.sqhk.co/pafatewodoju/aTGcfDF/21238202195.pdf
    • https://cdn-cms.f-static.net/uploads/4485012/normal_600b37fa64853.pdf
    • http://mrt36.ru/wormax._io_videos_de_prow3vru.pdf
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/bapemojubar.pdf
    • https://cdn.sqhk.co/temirikuji/iit8iio/mafia_city_redemption_codes_november_2020.pdf
    • http://sollabs.xyz/how_to_say_numbers_in_englishnctgs.pdf
    • http://grusha.space/ejemplos_de_suma_y_resta_de_polinomios_resueltosv9j9m.pdf
    • http://bluebadge-support.com/ancestors_legacy_trainer_freevycyn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daa6.bin
9bcf51af51867482db7e2ec75bb6c6012a255722bbb5aa8ebbda338fa6cd65a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA6 5460 bytes
font_01_sfnt_off0000ed37.bin
01ca35d2c198cc0bf4353d40dd8de677ec292cc82640576102154deda719f574		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED37 9752 bytes

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