Malicious PDF — malware analysis report

Static analysis result for SHA-256 8423fc1935e1f7b4…

MALICIOUS

PDF

124.8 KB Created: 2021-03-13 12:44:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c07b386fc6e669462746a094daf3dad0 SHA-1: b0f5bd9b1de8122bbd49f9a533f5f3a81f11b4b0 SHA-256: 8423fc1935e1f7b40c496f08c24e7dbd80199caacd59073e65de46388189323c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://seumenha.ru/wix?keyword=digimon+world+next+order+dna+digivolution+guide PDF link annotation
    • http://medyahanem.com/pepegitinay2vdw.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/iwRqQLy/bad_piggies_mod_apk_ios.pdfIn PDF document text
    • https://vogexuweju.weebly.com/uploads/1/3/0/9/130969932/bixatulagut_vowove_vigiz_nefaba.pdfIn PDF document text
    • https://cdn.sqhk.co/lokovipazal/yhh4bXP/lovecraft_country_season_2_cast.pdfIn PDF document text
    • http://lighterusb24.site/manly_p_hall_archive4bydf.pdfIn PDF document text
    • http://reduslim-official.website/69944448912ysq79.pdfIn PDF document text
    • http://xovijezup.mywebcommunity.org/sarawovezaweleduramenoto.pdfIn PDF document text
    • https://wakejowedab.weebly.com/uploads/1/3/4/5/134599651/libagov.pdfIn PDF document text
    • https://cdn.sqhk.co/tolademapati/hhKLhfl/lekoloxedesikajajuxorek.pdfIn PDF document text
    • https://bematurom.weebly.com/uploads/1/3/4/8/134886193/8462318deee0.pdfIn PDF document text
    • http://smcjd.com/minecraft_apk_android_sin_licenciamcpe9.pdfIn PDF document text
    • https://degezumibupupek.weebly.com/uploads/1/3/4/8/134862322/bujafawanototab.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/widinoxunakirodipizofat.pdfIn PDF document text
    • http://gejurabek.getenjoyment.net/58621423346.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/dCXhdgf/longboard_simulator_3d_skater_rushing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xipanizi.myartsonline.com/what_are_the_5_main_personality_types.pdfIn PDF document text
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_5abd8ef3f5d5452c8a69b642a6d783ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8a2babb-2209-4a95-be12-72b535064b93/how_to_record_dividend_declared_journal_entry.pdfIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_d8c0ab18da8b498eb6c141f59da80c48.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6786e13-8939-4342-9b26-f6edcfe995b7/how_to_reset_hp_deskjet_2545_wifi_password.pdfIn PDF document text
    • https://5ccda086-29c7-4024-8a93-689df1f3b89c.filesusr.com/ugd/ed8107_b8033b07ca254c679a4bcf83df8481db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/688ccc9b-4844-4eba-b75a-20ee58097413/xovokokajume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcdeec7e-f18c-4612-8c0e-c89b89bcc044/tozupilakanolosofikudat.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/scotsman_ice_machine_maintenance_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b324ba33-a309-4684-bd70-456ccad566b4/what_are_the_signal_words_used_in_the_text.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A4A 20876 bytes
SHA-256: 2fd2c767d8fbaf40935cf02bdd0ae903ed15136f2802c8d38b8a295e01363f58
font_01_sfnt_off0001ab8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB8A 5184 bytes
SHA-256: b6867246539634bcc10cbbdba1721bc9279c78b4c96b46464e792cb8ae2aad2c
font_02_sfnt_off0001bd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD32 11664 bytes
SHA-256: 4021f2565ea4f2637511336f859cf37d9cb4088d02e4f98becf4f76b005361d4