Malicious PDF — malware analysis report

Static analysis result for SHA-256 2710972d18f8e8b2…

MALICIOUS

PDF

70.3 KB Created: 2020-12-30 05:45:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d5c5265aa86d37d280d365d0f1ba0eab SHA-1: 9cc98bdfd44c5d2bc77e0931d78d9907b95e61e9 SHA-256: 2710972d18f8e8b2e9384f15bc88ea4873b4db6ded5113f51e440b30f5b75721
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'trafftec.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'Tutorial sign up jcu' and mentions wkhtmltopdf, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=tutorial+sign+up+jcu PDF link annotation
    • https://cdn.sqhk.co/busosuwik/geDgegf/41571681143.pdfIn PDF document text
    • https://cdn.sqhk.co/wemofisejaf/hihhia7/tapemonanijebe.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/jgdXjjZ/teach_english_online_jobs_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/pefatipi/Qkdcnhf/retro_warriors_jersey.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/MY0ZhfI/metrotex_dallas_application.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/TAiihiP/tie_dye_hoodie_wholesale_uk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca096cac-bfbd-4fac-b8f7-86af8e8ddcf4/phim_suc_manh_tinh_than_tap_13.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9726910a-833c-45ca-a710-d2801b612d38/acc_aha_guidelines_stemi.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/vitepolosumiperu.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/banaxesadavojaxisoso.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/canon_photo_editor_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f42b40-3da0-4b1a-94d8-823ec250b074/gamir.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/climate_action_fund_application_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/648f683e-5549-40d7-8917-830104028f88/dragon_ball_super_broly_english_dub_release.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_off0000d5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BF 5128 bytes
SHA-256: d26eee4962e22cb841adc018ac62f1b87cdb0897f487f886d76a2489f96662e4
font_01_sfnt_off0000e744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE744 10996 bytes
SHA-256: 62b31886e4ad62dfcd2c8d3a9d495eff4fd3d0e4e3b7bbfdae106d7422eef170