Malicious PDF — malware analysis report

Static analysis result for SHA-256 c052e8c584307d88…

MALICIOUS

PDF

79.8 KB Created: 2021-03-04 14:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 00cc9186d80c79c9479970fe60bfaba0 SHA-1: 46321a2a12bf554c6b385a2f369b57438ed0c2f9 SHA-256: c052e8c584307d8896bb3ffa5b447b79a143bcece7b9de2aa91b8a536983c8e4
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to 'climate change' and 'wkhtmltopdf', which are likely lures to disguise the malicious intent of linking to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://jottigo.ru/award?keyword=what+are+the+main+causes+and+effects+of+climate+change PDF link annotation
    • https://cdn.sqhk.co/xumesapaxoku/dHwCovJ/fortnite_trickshot_maps.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/the_summer_is_over_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_60210e2cb364e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393791/normal_5ff61efc958b7.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/pezegano_gewuten_ronutajuk.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/ghkgggj/25146394155.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/21058862506.pdfIn PDF document text
    • http://sesulup.iblogger.org/frontier_tv_guide_sarasota_fl.pdfIn PDF document text
    • https://tegidaweriwasul.weebly.com/uploads/1/3/1/4/131483440/cae39745.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382614/normal_5fcd3d028c0f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450519/normal_603f442859834.pdfIn PDF document text
    • http://leseweremizew.scienceontheweb.net/rosemount_5300_radar_manual.pdfIn PDF document text
    • http://ziwewixowele.sportsontheweb.net/osha_30-hour_construction_study_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411923/normal_5fcdb78843f8d.pdfIn PDF document text
    • http://zulurasovuguloz.66ghz.com/lesson_plan_template_for_teacher_evaluation.pdfIn PDF document text
    • https://meboropob.weebly.com/uploads/1/3/2/7/132740462/gadesifeluzi-ximopurine-fegizige.pdfIn PDF document text
    • http://napodosawukezob.getenjoyment.net/classical_guitarist_fake_nails.pdfIn PDF document text
    • https://cdn.sqhk.co/medukukekuke/Ihag3mL/download_huntercraft_mod.pdfIn PDF document text
    • http://sopisafexuj.sportsontheweb.net/dokanas.pdfIn PDF document text
    • https://kinijenu.weebly.com/uploads/1/3/4/6/134641264/6704158.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/ehbuigm/world_rowing_championships_2019_u23.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/dir_615_router_dual_band.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fizojigijuzad.epizy.com/rowenta_ironing_board_costco.pdfIn PDF document text
    • http://jabukejezari.epizy.com/61316301148.pdfIn PDF document text
    • http://jelelonu.rf.gd/naruto_shippuden_ost.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/cfa_level_2_curriculum_2020.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_off0000f032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF032 5448 bytes
SHA-256: dd90aa51a5ca2166eada3c962e5d31ff4f5545ef83444351e1a7b2792cfa2370
font_01_sfnt_off00010294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10294 2244 bytes
SHA-256: a7b12cb20737771b0bcd8005968c62aa8485644b5b933250330c273c233adbcc
font_02_sfnt_off00010cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBE 10504 bytes
SHA-256: 08217ec47990018335b802279855b56c87d8de5a43ce8e57d908f71f3817d72c