Malicious PDF — malware analysis report

Static analysis result for SHA-256 a37d212d861f663c…

MALICIOUS

PDF

79.6 KB Created: 2021-03-17 22:28:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0d94051a47271233039c2db9b685810f SHA-1: 7d5e4022e5d09285ba32f31d076f6c6348db3b76 SHA-256: a37d212d861f663c895acf05c6de6c8d5153c86c60f58c43af063d7a44d60f07
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content. The document body, though heavily obfuscated, contains text related to downloading audio Bibles, likely a lure to encourage clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://xezojetit.ru/aws?utm_term=descargar+la+biblia+reina+valera+1960+gratis+en+audio PDF link annotation
    • http://private-channel.site/biag_ni_lam_ang_tagalog_full_story5yaih.pdfIn PDF document text
    • http://magic-spring.com/how_to_play_baldurs_gate_multiplayerk8f6k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_600f16fef24d7.pdfIn PDF document text
    • https://sexanugujox.weebly.com/uploads/1/3/4/2/134266496/ranikaxim_posetom_nojugedakemi.pdfIn PDF document text
    • http://creditscorehelp.info/2020_bmw_x3_garage_door_openervph9x.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/gcthdib/46055700726.pdfIn PDF document text
    • https://nilizexuv.weebly.com/uploads/1/3/0/7/130739046/podok_bupixuj_gaxamibe_jodigubedowo.pdfIn PDF document text
    • https://vufepuxo.weebly.com/uploads/1/3/4/5/134522835/d9653b2c8d4b.pdfIn PDF document text
    • http://vashobereg.com/sakeguwetaragegajebenj25k3.pdfIn PDF document text
    • https://niwurepezexeted.weebly.com/uploads/1/3/5/3/135312419/8193330.pdfIn PDF document text
    • http://verifedform.com/96369387514ljvr7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485579/normal_5fc84fe1eb4b2.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/61602004348dbh41.pdfIn PDF document text
    • http://dalnoboyi.xyz/champion_dual_fuel_generator_9000_run_time4g832.pdfIn PDF document text
    • https://wofapebubedidu.weebly.com/uploads/1/3/4/5/134524968/vovijenunixivisuveme.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/Sxihhhi/jusuxikinubate.pdfIn PDF document text
    • http://ens-pictures.ru/baofeng_uv-5r_chirp_setuptg21t.pdfIn PDF document text
    • http://3-bureaureport.info/72530112278u3u15.pdfIn PDF document text
    • http://ogranicbio.fun/gejuradarudizesozaww87y2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8efd35f2-34f6-435c-b396-771e6eb42af7/lagijasezeridafasuwovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f028d22a-d850-4b2f-ba41-a3634a1807cf/83728620272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c360a81-12ab-4455-b1f8-cfc602031c93/are_giant_covalent_substances_soluble_in_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4bb99c-6682-47d7-8403-6e82659672e2/kajadome.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_off0000e6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F9 5808 bytes
SHA-256: f263060cf853f527da50eed0c576fe55923142871ee1f407ee4a6d7dc848b05b
font_01_sfnt_off0000fad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD0 3364 bytes
SHA-256: 88a699cd3cbd23e6bde2c84605fe0163165e46aa7306273124792d71583dbed2
font_02_sfnt_off0001087a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087A 12264 bytes
SHA-256: ce65001a7dd30d352e2f25a704d9f5318a38de8402728d07591a9c756ddde74a