Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c34c03a1fed56fd…

MALICIOUS

PDF

96.4 KB Created: 2021-04-20 16:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f0439836e42e29b0135d99d35264efed SHA-1: 9bb8e7517f54ec9f18aeefe4e8fa2ac933acf8e9 SHA-256: 6c34c03a1fed56fda43789d40e53d671f6902ce26132af0bc92b299a7167c228
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://mezovuduw.ru/strik?utm_term=oxford+english+malayalam+dictionary+free+download+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454419/normal_6058edc027e6f.pdfIn PDF document text
    • http://montana-media.com/2389210571xq28b.pdfIn PDF document text
    • https://gajamonorafu.weebly.com/uploads/1/3/5/3/135389334/4508003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471095/normal_6019f329d7185.pdfIn PDF document text
    • http://mibijuzorifif.getenjoyment.net/ielts_vocabulary_words_with_synonyms.pdfIn PDF document text
    • https://kezugefoluvero.weebly.com/uploads/1/3/1/8/131856244/tuvetabuku-dezajitapidov-laxumosalolat.pdfIn PDF document text
    • http://wide-mean.top/firefox_45_release_datefdf4s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421215/normal_6069dfceb9ded.pdfIn PDF document text
    • http://8gusevshop.website/31259243409bkgd1.pdfIn PDF document text
    • http://milafikolume.iblogger.org/correo_icloud_en_android_2017.pdfIn PDF document text
    • http://pasagotijaweti.iblogger.org/probability_aptitude_questions_with_solutions_download.pdfIn PDF document text
    • https://pazarufawituxib.weebly.com/uploads/1/3/4/0/134000032/wosozododego-mawenemukale-sizaf-bepotilesove.pdfIn PDF document text
    • http://kuliwegi.sportsontheweb.net/fluid_dynamics_physics.pdfIn PDF document text
    • http://pankreatitum.ru/384706395bmnq1.pdfIn PDF document text
    • https://movudari.weebly.com/uploads/1/3/1/0/131070737/022ea.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/xuxakiwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501361/normal_602d209cb3b2e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://gozadowosib.rf.gd/tcs_aptitude_questions_2020_download.pdfIn PDF document text
    • http://gubawakelu.onlinewebshop.net/bosch_800_series_dishwasher_panel_ready.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/xapesixutubizuwesura.pdfIn PDF document text
    • http://zewivijususilub.epizy.com/57832010076.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/43810942558.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 5648 bytes
SHA-256: 55330d54b5ce0d9e2e21099257e276bf0d01b75e9bddb9d53b7c964f68e1fcdf
font_01_sfnt_off00010302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10302 3808 bytes
SHA-256: 6e621b91ebca03e7d2c39f2ea536125a520b73a50e9af1da7e4aa916217b1558
font_02_sfnt_off000111a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A2 2488 bytes
SHA-256: 311f6d2fd921b90ba93dee90659d2f5dc7264d349406b8142116a49b36c07e6c
font_03_sfnt_off00011bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFF 11352 bytes
SHA-256: b2589f4b1d366fe7c0a683aee3cb274d4f90e116ea70a6c9cb8f5e246d5b266c
font_04_sfnt_off000142e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142E6 16392 bytes
SHA-256: 6dba5854a972f11ea50690dbd10bd732b527f03a7f02b22fceaad647e390bf0c
font_05_sfnt_off00015892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15892 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
font_06_sfnt_off00016692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16692 2752 bytes
SHA-256: 11bf571f0af05367446b2020c2f1c6267491649bc48117454eca19867f219dc9