Malicious PDF — malware analysis report

Static analysis result for SHA-256 973b204f651b0802…

MALICIOUS

PDF

71.7 KB Created: 2021-01-17 14:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 41e6b810784716b139aba1c07d93a761 SHA-1: bd5d9b4b1c4966d6c6902c55bb068af590e58d9a SHA-256: 973b204f651b08025eb04df4066fc8921cd870efaa0ba9edc9d95409de73dfd9
184 Risk Score

Malware Insights

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

This PDF file contains numerous embedded URLs, with at least one identified as a known malicious redirector. The heuristic firings indicate it's a link farm hosted on disposable infrastructure, designed to lead users to malicious content. The ML classifier and ClamAV detection strongly support its malicious nature, likely serving as a phishing lure or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/aws?utm_term=bam+chiki+bam+new+song In PDF document text
    • https://site-1174534.mozfiles.com/files/1174534/68813344138.pdfIn PDF document text
    • https://site-1249685.mozfiles.com/files/1249685/baby_picture_generator_free_no.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwezomu/LvgdIjj/airfighters_pro_apk_mod.pdfIn PDF document text
    • https://site-1178179.mozfiles.com/files/1178179/anime_in_10_words.pdfIn PDF document text
    • https://site-1173634.mozfiles.com/files/1173634/zurusizan.pdfIn PDF document text
    • https://site-1083884.mozfiles.com/files/1083884/50653689909.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/jehehhc/raid_dungeon_guild_of_heroes.pdfIn PDF document text
    • https://site-1238103.mozfiles.com/files/1238103/wonubajanalomi.pdfIn PDF document text
    • https://pujuferot.weebly.com/uploads/1/3/4/6/134657525/3810114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374368/normal_5fc098436e7b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453553/normal_5ffaf28daf19e.pdfIn PDF document text
    • https://site-1171687.mozfiles.com/files/1171687/banlieue_13_ultimatum_soundtrack.pdfIn PDF document text
    • https://kokonasaza.weebly.com/uploads/1/3/1/6/131636703/1104848.pdfIn PDF document text
    • https://nivunosanogerog.weebly.com/uploads/1/3/4/5/134516177/japoje_jikideduvidozu_kuxiwubabapus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449779/normal_5fbaabb53ebad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449614/normal_5ff6b85a3a925.pdfIn PDF document text
    • https://duveniwapawas.weebly.com/uploads/1/3/4/2/134265961/19ea2aaa5ce5f71.pdfIn PDF document text
    • https://site-1226457.mozfiles.com/files/1226457/archydro_for_arcgis_10__1_free.pdfIn PDF document text
    • https://site-1166616.mozfiles.com/files/1166616/temple_run_game_install_in_computer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCA 5428 bytes
SHA-256: e6e75bcb05be2d26ab6f31de89a314b9a4b73cc58b0a93252942c7ac86fda090
font_01_sfnt_off0000e239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE239 10084 bytes
SHA-256: 236dd9b0ed93f8ca11fd2e48e1581a1d9fabc78c8f52efb1a020eb0ef66961bc
font_02_sfnt_off00010500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10500 3016 bytes
SHA-256: 56aebda10e295f2fd787d81746c34b9d4a46f8fe60ef1c024c6fdffc36d60b56

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