Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd8d856a26b586d…

MALICIOUS

PDF

79.3 KB Created: 2021-02-01 05:00:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 414afc144e80f2c698f0eed4c19d3114 SHA-1: b7238c88402cf58d130b9281fddb210039394ecf SHA-256: 8cd8d856a26b586d1309d973d21f795735d69b1f55489e830fc616996e67b97b
154 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious URL suggests an attempt to lure the user to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/123?utm_term=march+madness+2020+bracket+online In PDF document text
    • http://amorexpo.com/guilherme_de_souza_nucci_codigo_penal_comentado_downloadhd0dl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416299/normal_5fc66a956eda2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5fdb8aac3dbbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481527/normal_5ff020d195db9.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/fmOhhuX/besosekekekazuke.pdfIn PDF document text
    • http://ru-en.xyz/complexity_and_contradiction_in_architecture_free_downloadhtcli.pdfIn PDF document text
    • https://cdn.sqhk.co/zisubiziwu/jeifnhe/tank_stars_free_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bosesegivu/mGSzheA/1798303528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375907/normal_5fd93fd78874f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5fe6e16b305ae.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/jezaxojipevu/52421369584.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/gta_cheat_codes_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/81346018908.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/edgenuity_answer_key_english_3.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/gambar_peta_negara_brunei_darussalam.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/nibujosewebewenezepamuzek.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/33369374676.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/manually_run_archive_outlook_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/zowedovomonebifomubo.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/49374123444.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_off0000e9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DA 5452 bytes
SHA-256: 28432a6b1207d3aa55b7846026794a0f92d81c41807bf108de4c745c2119e8a5
font_01_sfnt_off0000fc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2E 10964 bytes
SHA-256: 37a27b615eb222dc8018e94e9c76118dab036eaf3b259ed8777f5dcaaa1002f8
font_02_sfnt_off000121c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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