Malicious PDF — malware analysis report

Static analysis result for SHA-256 627059cad07ed7de…

MALICIOUS

PDF

79.9 KB Created: 2021-05-03 21:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 48642fc34335732e8427aff97e16a47f SHA-1: 9c9052eab3e1422fadf7da15f058bc527c284276 SHA-256: 627059cad07ed7de35151a714175ef0adb4b8469ef493fedd66d21863a1e5e00
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://gimoguvi.ru/strik?utm_term=kalender+pendidikan+2016+dan+2017+jawa+barat PDF link annotation
    • https://raxefikijizusiz.weebly.com/uploads/1/3/4/8/134881470/8554064.pdfIn PDF document text
    • https://cdn.sqhk.co/wolanojijen/9kjitig/stickman_run_shadow_adventure_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/romumoxoleno/jdghia4/26962273712.pdfIn PDF document text
    • https://cdn.sqhk.co/vefobinibe/C6heFYI/wekudusodexad.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/OYgchaf/gokikuz.pdfIn PDF document text
    • https://ganepivojo.weebly.com/uploads/1/3/4/7/134774155/208af73aaec8.pdfIn PDF document text
    • http://ihsteam.ru/troy_bilt_mustang_rzt_50_parts_diagramqg9qs.pdfIn PDF document text
    • http://stroy-level.ru/kunir0ltp9.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/hfAjgS7/narirubokuwesuretot.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/98217029314v8huy.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/z9vhiSE/cowboy_beans_recipe_with_ranch_style_beans.pdfIn PDF document text
    • http://kavademive.sportsontheweb.net/76729163472.pdfIn PDF document text
    • https://vujebitaj.weebly.com/uploads/1/3/4/7/134759162/nugoni.pdfIn PDF document text
    • https://papobujiwirila.weebly.com/uploads/1/3/1/4/131453114/xudosigexunukidajote.pdfIn PDF document text
    • http://kaxiwemusemoj.mypressonline.com/senior_desktop_support_engineer_interview_questions_and_answers.pdfIn PDF document text
    • http://item-mask.top/how_do_i_connect_my_hp_deskjet_2700_printer_to_wifiwd6rv.pdfIn PDF document text
    • https://dovenokitumenu.weebly.com/uploads/1/3/1/4/131482991/0d26a597e38.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/ham_iv_rotor_wiring.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/40581281833.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/agnisakshi_serial_title_song_lyrics.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_off0000f9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F6 5676 bytes
SHA-256: 16a15528b6292ab489a5cdd27398bb57d59656f1820cca2d43cfb1f3d9fbe54e
font_01_sfnt_off00010d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D73 10288 bytes
SHA-256: b0f62971385f41dbc4797dabf04038451a83c565680e2066d3f34a00a4f1f4d4

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