Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9e9aff494d43ed…

MALICIOUS

PDF

84.4 KB Created: 2021-02-26 08:18:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: ac9fa2b0dfa97e752cbd914efb9151e3 SHA-1: d52fdaa04041973adec078b7478010a23616d618 SHA-256: 2e9e9aff494d43ed2c2e340016743c1b67b57c67a02885b389c554167705d3db
174 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of a call-to-action phrase further supports the lure mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=the+cannabis+encyclopedia+jorge+cervantes+pdf+download PDF link annotation
    • http://dovejeve.22web.org/kicker_motor_mount_swim_platform.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455399/normal_6033b4321fe58.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/idegf93/tripp_trapp_high_chair_review.pdfIn PDF document text
    • http://kesawalaxok.iblogger.org/galveston_bay_fishing_guide_reviews.pdfIn PDF document text
    • http://duvukawobuja.iblogger.org/xejetiti.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/jegiLox/gluten_free_korean_scallion_pancake_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/jficuia/war_conqueror_4_hack.pdfIn PDF document text
    • http://rigojakivuvemi.iblogger.org/13794668401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_5fe9122fbeb1c.pdfIn PDF document text
    • http://vemajewedekag.22web.org/89896305499.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384318/normal_5ff5df3d5cab1.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/how_to_clean_bose_wave_radio_cd_player.pdfIn PDF document text
    • https://cdn.sqhk.co/wavefekus/dzgcMDB/73245413115.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454562/normal_5fdf4a4e43f6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483608/normal_60264cfa846ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rufupiz.rf.gd/wupukixesojokuwi.pdfIn PDF document text
    • http://borinalujid.epizy.com/fazib.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/podusubuxumozow.pdfIn PDF document text
    • http://savipifuza.rf.gd/70277420019.pdfIn PDF document text
    • http://sukasorepej.rf.gd/pimudogurukenoki.pdfIn PDF document text
    • http://lafonariki.rf.gd/milady_chapter_15_study_guide_answers.pdfIn PDF document text
    • http://munakazoxan.epizy.com/commando_2_full_movie.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/what_is_the_best_starbucks_coffee_beans.pdfIn PDF document text
    • http://nelojodopon.epizy.com/zubufimiwukirepolezafas.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_off0001091f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091F 5836 bytes
SHA-256: e48c370d1d50b5c7b8b9292322b4d6503c1cfcd1f6b0302d0285e430f9df729e
font_01_sfnt_off00011d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D17 11124 bytes
SHA-256: c6ba8d220d155e6022bd30951f33e2fabbbf3127be4e54bc82dc26475832af17