Malicious PDF — malware analysis report

Static analysis result for SHA-256 85c3be87b87e502e…

MALICIOUS

PDF

83.6 KB Created: 2021-05-09 14:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6aecdfb0e95bb4d69658cbc0b482292c SHA-1: 5cc44b002724bdc20cc95456afbb0a05c5e8b6b9 SHA-256: 85c3be87b87e502e49aa8d6e65edbda421e3e6d741dc36c73b74635adb96a184
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain metadata related to wkhtmltopdf and statistical exercises, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=ejercicios+estadistica+3+eso+intervalos PDF link annotation
    • https://cdn.sqhk.co/jojikoxazew/girA2gh/71482723898.pdfIn PDF document text
    • http://mikazuxo.mypressonline.com/regional_anatomy_of_the_abdomen.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/business_plan_for_online_shopping_website.pdfIn PDF document text
    • http://rajudadude.mygamesonline.org/partes_de_la_celula_bacteriana.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/hfjfUge/mastercraft_building_group.pdfIn PDF document text
    • http://awpmode.com/32798745230lzhtu.pdfIn PDF document text
    • http://zawopim.mygamesonline.org/ankle_sprain_physiotherapy_protocol.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/guUtY2B/1598446251.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/hgDjojg/quad_squad_gardner.pdfIn PDF document text
    • http://kevufeduwatawos.mypressonline.com/kidoraworikuz.pdfIn PDF document text
    • http://pisufixefonof.scienceontheweb.net/breast_cancer_project.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/madame_butterfly_restaurant_savannah_ga.pdfIn PDF document text
    • http://masajsalonunuz.com/adobe_photoshop_tutorials_for_beginners_step_by_stepbv2kx.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/j6ge0gf/moxagal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sukobogixe/manual_paper_roll_cutting_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/dreamboxedit_3._0.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/66046095141.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/kopifagokupon.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/89236527557.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/tajolagomasu.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/jajevedutizerukolinujab.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/cavalier_c51_coke_machine_parts.pdfIn PDF document text
    • http://nuwadolonopip.onlinewebshop.net/scag_wildcat_parts_diagram.pdfIn PDF document text
    • http://zerowegujij.onlinewebshop.net/rewovafamuvifobitexabe.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_off0000fb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB19 4976 bytes
SHA-256: eefed0eafa0a036b773ba1e36e29d84db2b62a9195ec5b3c4193e87363f7acca
font_01_sfnt_off00010c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0F 11244 bytes
SHA-256: 3566600e0cb1927d4a0f7f3284d57725bc1c300bef3da693e8790daf8b9c23e2
font_02_sfnt_off000130cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130CB 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

Open this report in the interactive analyzer, or submit your own file for analysis.