Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c6b87404127e16…

MALICIOUS

PDF

75.3 KB Created: 2021-03-29 19:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe2b686e62f0ba48e399de8da4ee92f7 SHA-1: d7a38f702a4663dafc3e01b78d1636c8bcccab12 SHA-256: d9c6b87404127e16ccea0991d027250310be99dec78ec618a768b541b0b0712b
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains an embedded URL pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to recipes or technical information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=vitamix+recipes+soup+broccoli
    • https://cdn.sqhk.co/karadirimose/cNjcigi/bomaputedalafanu.pdf
    • http://lessonsonline.site/670510349055vwsv.pdf
    • http://nisekuwodixuv.22web.org/what_is_jesus_name_in_latin.pdf
    • http://negeduji.66ghz.com/bhakta_kumbara_audio_song.pdf
    • http://stopro.store/fisigibasuvovelivibopefake9go.pdf
    • https://cdn.sqhk.co/zujomawa/jhpyihP/manga_maker_app.pdf
    • https://static.s123-cdn-static.com/uploads/4461205/normal_5fe21a6c8f79e.pdf
    • http://vutatux.22web.org/toshiba_regza_tv_stand.pdf
    • http://honbiz.pro/lujapabudaimw2e.pdf
    • https://cdn.sqhk.co/batumozi/Yyicihg/autonics_panel_meter.pdf
    • https://cdn-cms.f-static.net/uploads/4448731/normal_6018517ae9a2e.pdf
    • https://cdn.sqhk.co/rujiwujik/iMVLjaq/15687256644.pdf
    • https://cdn.sqhk.co/xuvisisitinu/igicNid/turn_off_folder_sync_windows_7.pdf
    • https://cdn.sqhk.co/zanotunuzi/hifijhh/dragon_quest_tact_review.pdf
    • http://fionainthefield.org/4321254619fle1z.pdf
    • https://cdn-cms.f-static.net/uploads/4378390/normal_600ea69e98568.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vekamujibatebig.rf.gd/68747770165.pdf
    • https://uploads.strikinglycdn.com/files/b56e5f6a-8480-4816-b640-30e5db686561/rowegubitijepovixo.pdf
    • https://uploads.strikinglycdn.com/files/793e6a34-f87d-49fa-9bf9-bcbbf0dcbf98/kovoza.pdf
    • https://uploads.strikinglycdn.com/files/8e164bee-3ca6-4b6e-89ba-e614a1d0479b/this_modern_love_will_darbyshire_vk.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e797.bin
01d620d39a731fa12b35e9e397528388749e9f029471da9bccebeb6362ed3b0f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE797 5252 bytes
font_01_sfnt_off0000f95e.bin
09c2bb7de4a79fa15dd83705f210e7ce4654317594ceedde679c179420616b66
pdf-font-stream PDF embedded font (sfnt) at offset 0xF95E 11264 bytes