Malicious PDF — malware analysis report

Static analysis result for SHA-256 de21fe3ea5cc4494…

MALICIOUS

PDF

81.0 KB Created: 2021-03-25 14:29:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 26c7bbad4ac387efec5fbb421eb6cd01 SHA-1: 203430a9748f095c05b74c236bd0104622544de1 SHA-256: de21fe3ea5cc449492b3f89377c81147ac7c87e283c10a201229b2546d00d918
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The embedded links, such as 'https://crophysi.ru/wix?keyword=ac+market+apk+download+latest+version+2019', are designed to lead users to potentially harmful sites. The ML classifier also strongly indicated maliciousness, supporting the overall assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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.
  • 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/wix?keyword=ac+market+apk+download+latest+version+2019 In PDF document text
    • https://cdn.sqhk.co/duxadikoti/Rhdo2KL/16833508551.pdfIn PDF document text
    • https://desijikero.weebly.com/uploads/1/3/5/9/135964668/9232356.pdfIn PDF document text
    • http://dazipuv.iblogger.org/who_are_the_characters_in_the_story_dead_stars.pdfIn PDF document text
    • https://cdn.sqhk.co/zexatexa/GzFn6gj/agt_2019_final_performance.pdfIn PDF document text
    • https://cdn.sqhk.co/gabebutiz/hfafKjj/48937155714.pdfIn PDF document text
    • http://kuvijuwe.22web.org/guidance_note_on_accrual_basis_of_accounting.pdfIn PDF document text
    • https://sakiverore.weebly.com/uploads/1/3/6/0/136095660/tutusagogo_rewopaveg_pukoboga_dujimu.pdfIn PDF document text
    • http://fezelaradelemuj.22web.org/microsoft_authenticator_app_minimum_android_version.pdfIn PDF document text
    • https://cdn.sqhk.co/tesolivu/hjswjQJ/nintendo_switch_online_uk_cost.pdfIn PDF document text
    • https://vizexetu.weebly.com/uploads/1/3/4/8/134864552/7830407.pdfIn PDF document text
    • https://cdn.sqhk.co/wepaxuwelusu/1kihChh/labawukodutum.pdfIn PDF document text
    • http://fafazegadaxe.22web.org/follow_me_bbc_learning_english_free.pdfIn PDF document text
    • https://vokinojen.weebly.com/uploads/1/3/4/8/134851280/85d3c22fa.pdfIn PDF document text
    • https://cdn.sqhk.co/dosazuleg/feiiDzH/bezaw.pdfIn PDF document text
    • https://gunosevibo.weebly.com/uploads/1/3/4/7/134716368/tamejipidikemibitaz.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://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_06ef160a93f4462daef64eee974cd8d4.pdf?index=trueIn PDF document text
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_67a76130b1834d4cbf375f2e5f93671f.pdf?index=trueIn PDF document text
    • http://ruwabegaxiz.epizy.com/game_rpg_online_android_terbaik_2018.pdfIn PDF document text
    • http://gataton.rf.gd/vefegaz.pdfIn PDF document text
    • http://bukulifuxevet.rf.gd/99772976299.pdfIn PDF document text
    • https://b7d3a0ae-8059-487b-8826-088776693174.filesusr.com/ugd/8d23e4_2141cdb03a424baeba702bfc22297176.pdf?index=trueIn 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_off0000ef4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4B 5692 bytes
SHA-256: 196d8838e8bb170cdca4c2cde85ed72f9075104615dfd5bbce564e8b8baff0c4
font_01_sfnt_off0001029b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029B 10996 bytes
SHA-256: 74efe9013b17474c75101385ff11d15672c65f292c29b6c5703d262169b794f4
font_02_sfnt_off000127f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176