Malicious PDF — malware analysis report

Static analysis result for SHA-256 2046a9afe526767f…

MALICIOUS

PDF

79.7 KB Created: 2021-03-07 10:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9209a49e21cf41b9f80fc62299410e82 SHA-1: 5dc7bee07be66cbcf52916905728e58da1cf808f SHA-256: 2046a9afe526767fb7e023a0184c9a197277429756cc94a753d5c80d26001d40
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains text related to a lure, and an external URI points to a suspicious domain. The presence of embedded URLs and the overall detection suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://zajinet.ru/strik?utm_term=how+to+set+draw+weight+on+diamond+infinite+edge PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500187/normal_60294b86d9c78.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/hiifjfk/azamara_pursuit_cabin_amenities.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_6016048f49856.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/ggdXghA/lock_screen_windows_10_wallpaper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410988/normal_6036981c9488f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417207/normal_60180d72906b5.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/icjil34/97658244636.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/Fwighha/26394727407.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarimeg/lhChjgg/93064860771.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480399/normal_6008fa9a04de2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453100/normal_600829981a6b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mizeteb/legakov.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/57973920578.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/80604671775.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/63007175213.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/xovimude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e4cde2a-9dcd-4f89-9cd1-4810cd5c95ba/tree_of_life_movie_ending.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/flush_dns_di_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5973e4b4-5f2c-41c5-9800-fe0ec38e03b0/vozatoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/estudio_sobre_el_bautismo_en_agua.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/why_is_my_canon_g3600_printer_not_printing_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10ef0e06-a58b-476f-b71a-1cc69579f056/husky_30_gallon_air_compressor_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c0b39e0-f08a-47d9-8a51-ebec4a94b640/rebadavoxiwelapuju.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_off0000f912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF912 5340 bytes
SHA-256: 274b8924419547e41dd4ef1a2369e9b3e039a1820bd1bec5a756a187f27cd322
font_01_sfnt_off00010b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B22 11016 bytes
SHA-256: 4934f6f61b4c66a41d9b275b953eb51bda2e7fb8796f46cea5bc0dc695924b9f

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