Malicious PDF — malware analysis report

Static analysis result for SHA-256 be08de3ba7f75996…

MALICIOUS

PDF

79.9 KB Created: 2021-03-28 04:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5a39d446a3688688bac01db3e9fa85cc SHA-1: 5a8fe5b78f294d7e5e4d95a683dc036de86a6be7 SHA-256: be08de3ba7f759969f24805b67e077c098e3a5a20cc03ce0f057be56c5577771
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jumiwimov.ru/wix?keyword=glencoe+economics+principles+and+practices+answers PDF link annotation
    • http://novazeku.mygamesonline.org/91627486082.pdfIn PDF document text
    • http://tarenutufitox.66ghz.com/sonogugor.pdfIn PDF document text
    • http://finoginujowiwi.mypressonline.com/how_many_halo_novels_are_there.pdfIn PDF document text
    • https://robidolaw.weebly.com/uploads/1/3/0/7/130776002/595b114.pdfIn PDF document text
    • http://muzotom.22web.org/can_resistance_bands_help_tone_arms.pdfIn PDF document text
    • https://fodivavix.weebly.com/uploads/1/3/1/4/131483454/topupeguzitape_gajimedabo_delajonuromox_tazufuzowige.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/creo_parametric_2._0_for_designers.pdfIn PDF document text
    • https://gidisapawifo.weebly.com/uploads/1/3/4/6/134611794/sowusuvurovebu.pdfIn PDF document text
    • http://xatitakuv.iblogger.org/mivawetizowukoz.pdfIn PDF document text
    • https://jasitonil.weebly.com/uploads/1/3/4/0/134096785/0c1f454935e.pdfIn PDF document text
    • https://rudadikisoma.weebly.com/uploads/1/3/1/6/131606677/xujetuzurixam.pdfIn PDF document text
    • http://wapajag.22web.org/dell_e6410_a09_bios_update_download.pdfIn PDF document text
    • https://xutezanepone.weebly.com/uploads/1/3/3/9/133999331/sunidiga.pdfIn PDF document text
    • http://vizozipemovowe.iblogger.org/gibbs_free_energy_practice_worksheet_answers.pdfIn PDF document text
    • https://lokesikaneweb.weebly.com/uploads/1/3/1/4/131437695/5297680.pdfIn PDF document text
    • https://wudatoguji.weebly.com/uploads/1/3/4/8/134885495/mikowilawedujo.pdfIn PDF document text
    • https://zunenevalomedo.weebly.com/uploads/1/3/4/8/134855990/demavegafubunifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/new_testament_bible_trivia_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cf84e54-d2c1-4fa8-bde4-633ca7f12bae/bandura_social_learning_theory_in_the_classroom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8c65b1c-1644-4377-bc1e-6b320adf7a48/nofurejirerolar.pdfIn PDF document text
    • http://visobiwedixupip.rf.gd/xuratipel.pdfIn PDF document text
    • http://tekubone.epizy.com/modern_physics_resnick_halliday.pdfIn PDF document text
    • http://vamafawuf.epizy.com/71926329262.pdfIn PDF document text
    • http://ronarag.epizy.com/69942875736.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_off0000fbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD4 5340 bytes
SHA-256: 99d02b09f426acb73b76aa05395bb1a388d0c935f96e8b14c31df577e9a921bf
font_01_sfnt_off00010dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFC 10308 bytes
SHA-256: 3eaff86679883105da660f8a9d68e0d595da3f8f8e24b43b40c402aaf77b5f29