Malicious PDF — malware analysis report

Static analysis result for SHA-256 6edc646654714d49…

MALICIOUS

PDF

83.1 KB Created: 2021-01-24 13:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1fb42a8739c9f84e7af5d458e24f3174 SHA-1: 0689575bcc5f60bb6a7893dce5f7a66bf1313974 SHA-256: 6edc646654714d49c1833ec276564e9cd40b0ae65ee6aa074716478af408dd22
184 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a phishing trojan. It contains numerous embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain keywords related to payment and app downloads, suggesting a lure for users to click on the malicious links. No scripts were extracted, but the presence of numerous links to disposable or suspicious domains indicates an attempt to redirect users to potentially harmful content.

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 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://traffine.ru/wb?keyword=payfazz%20agen%20pulsa%20ppob%20termurah In PDF document text
    • http://kisiguvawatabom.22web.org/26961724177.pdfIn PDF document text
    • http://tersq.space/guide_for_free_fire_2021_updatenna31.pdfIn PDF document text
    • http://ventager.online/baxudutoxowebo9ki.pdfIn PDF document text
    • http://stikc.xyz/mogodaduxojodedoxokiwueu9g4.pdfIn PDF document text
    • http://magic-world.site/55102444777l63v0.pdfIn PDF document text
    • http://igcopyrightforhelps.com/download_game_nba_2k_mobile_basketballhdtrg.pdfIn PDF document text
    • http://buloshnaya.site/hockey_manager_2020_pcpbhhp.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/galaxy_attack_alien_shooter_5._18_mod_apk0x4vf.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/hbhjibF/95806166044.pdfIn PDF document text
    • https://cdn.sqhk.co/jisanipu/gvjb3GZ/mikomerepezosonox.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/ieVjfVh/38285942760.pdfIn PDF document text
    • http://shopee24.site/radar_mobile_speed_gun_for_sale5pc9q.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/Cg4QiiM/19771960027.pdfIn PDF document text
    • http://sparzha.club/besemopemedugeromqw1zo.pdfIn PDF document text
    • http://varnisvakq.ru/human_resource_management_journal_articles_2020q76c5.pdfIn PDF document text
    • https://cdn.sqhk.co/dederubap/bmhOyig/lucky_block_command_ps4.pdfIn PDF document text
    • http://priz24.site/volipir13e0i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kekabipiji.rf.gd/conjunction_and_interjection_worksheet.pdfIn PDF document text
    • http://vedaremix.epizy.com/esc_cardiogenic_shock_guidelines.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69B 5608 bytes
SHA-256: 5612f7eca96ec0fbcadd2ffa2fc76827492f678081366a7a6a74e7e51d7d9cda
font_01_sfnt_off0000f992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF992 1972 bytes
SHA-256: cf0d8fb5527eae19401dfc12654250517e7a38e3cc95ac791bee53c0147e1778
font_02_sfnt_off00010305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 11204 bytes
SHA-256: dfcd16f5759fdbdfd3f4ba3fb72fa811b400b3e88f0b99a97adfb11904127c45
font_03_sfnt_off00012961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12961 16140 bytes
SHA-256: 3f83bbfb2e03141a9083badfb1da6e2b1773f9aa6b1ed8f30fc2d392a5ee3553