Malicious PDF — malware analysis report

Static analysis result for SHA-256 861535a2765ef1be…

MALICIOUS

PDF

63.0 KB Created: 2021-02-13 17:10:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3ea15c06b058b5017c17eaf65d5f370a SHA-1: 33c53b7ca5a08aff3948ef99ea0ce2f20228acb3 SHA-256: 861535a2765ef1be34ff0cc0e34ab9b293e4dc0713f7d1d71decc9ccf13feaea
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious payload. While no scripts were directly extracted, the presence of embedded URLs and the nature of the ClamAV detection (Pdf.Phishing.Trojan) suggest a phishing or trojan distribution attempt, likely delivered via spearphishing.

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://bologen.ru/123?utm_term=bendy+and+the+ink+machine+toys+plush PDF link annotation
    • https://cdn.sqhk.co/kososojog/AmicieR/jet_ball_taiwan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382614/normal_60273f6496d4c.pdfIn PDF document text
    • http://mushygushysayings.com/42709985976wfqsl.pdfIn PDF document text
    • http://yoga-fitness.space/color_chart_hair_wheelo5dp3.pdfIn PDF document text
    • https://cdn.sqhk.co/fezivabuja/fjjGMhe/68946006897.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/DBYa5jc/stickman_soccer_2018_kits_barcelona.pdfIn PDF document text
    • http://site-shop.xyz/wunalejenuleroxabakegeroxfeid.pdfIn PDF document text
    • http://dietnatur.fun/720955490674oows.pdfIn PDF document text
    • http://websporizle4.com/73142164735rcy21.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/g4SGXpX/24102269680.pdfIn PDF document text
    • http://mkuu.club/web_browser_for_smartwatch_apk7tsu7.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/g3Hq8Jh/smash_bros_switch_dlc.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/pexodugosa/30007013356.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/43673852741.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/chamma_chamma_new_song_video_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/metformina_efectos_secundarios_piel.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/cannon_fodder_dos_game.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/pdf_bridge_to_terabithia.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/analog_heat_mk1_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/fagozanoj.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/renewable_energy_presentation_powerpoint_template.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_off0000b83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB83D 5432 bytes
SHA-256: d96dddf0ee1b38a0fb50c20179c7d5b7eb8e50f93bc09d192582f16c75f644ed
font_01_sfnt_off0000ca9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9F 10208 bytes
SHA-256: 5c9da7d70048e3dbe9803185eb8847b22e61b6f5e27ef66a85b8891ebfe409b1

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