Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedf4852b576cd7f…

MALICIOUS

PDF

77.6 KB Created: 2021-04-04 18:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9bfeea13ff226b4c11e024ae7cedec99 SHA-1: 91aa1e214843db2fbb8e7751a9738406463fa958 SHA-256: eedf4852b576cd7f339fdf009a809bd52afffde2041eb5e9b4776498650c2789
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The sample is a PDF document that impersonates Outlook and provides a lure related to resetting voicemail passwords. It contains multiple links to redirectors and disposable hosting, indicating a phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://mozepuboxiwagu.weebly.com/uploads/1/3/6/0/136094106/betepa_gukevi.pdf.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://soxebez.ru/strik?utm_term=how+do+i+reset+my+tracfone+voicemail+password PDF link annotation
    • http://tizadejaso.getenjoyment.net/59742496783.pdfIn PDF document text
    • https://mozepuboxiwagu.weebly.com/uploads/1/3/6/0/136094106/betepa_gukevi.pdfIn PDF document text
    • https://bopojebokup.weebly.com/uploads/1/3/1/4/131408204/melawokijatiwupobi.pdfIn PDF document text
    • https://rapelolizoxofi.weebly.com/uploads/1/3/1/3/131381924/puzam-pugijijefigoni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410414/normal_606382982ad10.pdfIn PDF document text
    • https://kinotadi.weebly.com/uploads/1/3/1/6/131606109/8436703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388428/normal_6065fdd60b7ec.pdfIn PDF document text
    • http://odemebayisitrafik.com/home_rent_receipt_word_formatj6a2m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413583/normal_5ffa33ed1b6ba.pdfIn PDF document text
    • http://bitcoinov.site/how_to_use_audio_on_bible_app4dv1e.pdfIn PDF document text
    • https://kewegiru.weebly.com/uploads/1/3/1/4/131438086/fiforawogobob_kekoforul.pdfIn PDF document text
    • http://dkshlyap.ru/615961516311jesf.pdfIn PDF document text
    • http://vuletotam.scienceontheweb.net/huelga_de_cananea.pdfIn PDF document text
    • http://fallofelin.online/idle_mine_rpg_mod_apk_0._6._17jxxg1.pdfIn PDF document text
    • http://jopkapopka.online/17199986544at6ke.pdfIn PDF document text
    • http://venolilixe.mygamesonline.org/gejedezujexupor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472768/normal_6025338ae16e9.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/d5268f22-0fe0-452e-a8fe-a0ede914ac8e/how_do_i_activate_my_new_comcast_cable_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eab053b-0db8-4fc9-baf9-6e84fcba318d/subway_surf_apk_indir_para_hilesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d14f372-5e50-46fe-afd6-e4ac8176522f/what_type_of_oil_does_a_craftsman_snowblower_take.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/51367529984.pdfIn PDF document text
    • http://fazaburifug.myartsonline.com/wilekipiv.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/pasavekidivebidagapale.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_off0000f29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29F 5516 bytes
SHA-256: 1a143ea9a115e583f0f651f58bf2f999359b756e15f455a1e993bec8fb0c4535
font_01_sfnt_off00010564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10564 10404 bytes
SHA-256: a2c1fa78ade4e435219434efe6ae5e974db0073321ad61c64746ba44e6973b79