Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe6a7ec99c8eb1e…

MALICIOUS

PDF

79.6 KB Created: 2021-04-11 07:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dcb67644d88da487a89c03e6fbaf5ab8 SHA-1: b19aa896b8f4763e78ffcfa0ee9f26133e0209db SHA-256: 1fe6a7ec99c8eb1e2b10ecda711b39b58e3da682c78af19ac795d45e8d37987f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'dugedepap.ru', likely serving as a lure. The document body, though heavily obfuscated, appears to be a garbled attempt to mimic search result content, further supporting a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://dugedepap.ru/strik?utm_term=why+does+my+hedge+trimmer+keep+cutting+out PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483103/normal_600fba3e30f4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418379/normal_5fc9fa6f9a40a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388814/normal_605be164149b1.pdfIn PDF document text
    • http://tideboweped.medianewsonline.com/healthy_smoothie_recipe_book.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/lopelubuwixigudizuj.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/59410702399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5fe6a139f32ac.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/how_to_file_a_complaint_against_a_judge_in_illinois.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459464/normal_601855e89c713.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/5dab298b-7b4d-4f5c-a172-b0274f023942/55491335027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/476952be-82a0-498d-9fbf-fd163ff3d99e/69942396353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3aed41b-cdf0-4adb-a429-e90641517ce8/13940896252.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/comentario_texto_argumentativo.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/78545961934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5daf0b4-782c-4ef8-a65a-a53717aa4a10/how_much_does_the_postal_service_charge_per_ounce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc3ba68-375e-4f27-ba2e-ed6de348fd4b/what_percentile_is_152_on_the_gre.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/vifilevajavaniledikaxevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/802bf794-ee52-4135-8f79-e6be9557e6f7/agentes_secretos_y_el_mural_de_picasso_chapter_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b450cc4f-75c3-47ca-96de-d78f2edf3374/45059778702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630fd593-8469-4653-b4c9-f166958ddf12/msi_z97_gaming_5_code_00.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d7ff1f-4e38-49ae-9779-96495a598097/56362735196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1bcbb3f-2254-429d-a6b5-3860ebca825b/supplementary_angles_worksheets_grade_6.pdfIn PDF document text
    • http://zuxokoberibaw.atwebpages.com/59033721796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b66603-dc0e-4957-88af-45e435d213d1/what_does_student_engagement_in_education_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3383683d-7d78-49a4-99ea-39a4895d4a6d/33948845699.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/diagrama_elctrico_de_transmisin_automatica_a604.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/60988372281.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_off0000f70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70A 5424 bytes
SHA-256: aaa83feb3017416b82e6022de843ec6da8f63ca8f31320d0e52b6f8523af6b50
font_01_sfnt_off00010970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10970 11664 bytes
SHA-256: fedf765f198d4bc52d62a33b77c387e4fd15ddf92a8397b852fff16ffcced186

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