Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b5dd2a1284038a…

MALICIOUS

PDF

79.7 KB Created: 2021-04-27 22:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7d5ba370aba2f0247c417e18ddbe3200 SHA-1: 1ce772530e446500073166dcfc387e5928c28d9f SHA-256: 49b5dd2a1284038ad868c43a14f506bce2e15bb3e68e09aacb9f7bdc103a8475
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Steal or Forge Credentials T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing and a callback-phone (TOAD) lure. 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 0.9990

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://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/mawezinevawiker-wirowobasebin.pdf.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/strik?utm_term=how+to+put+call+forwarding+in+samsung PDF link annotation
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/mawezinevawiker-wirowobasebin.pdfIn PDF document text
    • http://amst-watch-v2.club/the_lord_of_the_rings_movie_in_telugu_dubbeduj8t7.pdfIn PDF document text
    • https://wabexerimib.weebly.com/uploads/1/3/0/7/130739061/6481933.pdfIn PDF document text
    • https://fiwirozubaxezu.weebly.com/uploads/1/3/4/6/134659856/damagamalinawi_refukutubobab_sixiwazezu.pdfIn PDF document text
    • http://niwizonoleror.mywebcommunity.org/panasonic_kx-tgp500_reset_password.pdfIn PDF document text
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/9352233.pdfIn PDF document text
    • http://gepozuj.iblogger.org/zapediwifu.pdfIn PDF document text
    • http://bobixina.getenjoyment.net/funezodimiw.pdfIn PDF document text
    • http://qrettalq.online/cuales_son_los_tipos_de_archivos_de_audioz6bz2.pdfIn PDF document text
    • http://handler-autoscout24.com/10716872109q54vw.pdfIn PDF document text
    • http://gufutaca6.xyz/alhaji_sikiru_ayinde_barrister_songs_freeqbs4i.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/weber_bbq_natural_gas_jets.pdfIn PDF document text
    • http://pubgucbayim.com/xafisodotipukavapafufoj2oybh.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://s3.amazonaws.com/widiku/34588845299.pdfIn PDF document text
    • http://vedomoz.rf.gd/96575443492.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/sbi_corporate_card_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a6073f4-8ff5-4436-8f22-3c4edcc91693/book_of_the_secrets_of_enoch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a6de173-0cf5-4953-8d46-1916dc25bf24/dr_seuss_coloring_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb56958-e2ec-415a-aca2-385d777cac7d/11110976328.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/charter_email_not_working_on_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0b43377-d48f-4d13-84f0-d28d55df3ab9/96910004567.pdfIn PDF document text
    • http://voxaxos.rf.gd/zekuzevalokurepo.pdfIn PDF document text
    • http://zapulozamatuwe.epizy.com/mamas_and_papas_cot_fitted_sheets.pdfIn PDF document text
    • http://tefotesowigix.epizy.com/91126288655.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/inter_1st_year_english_textbook.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_off0000ed79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED79 5292 bytes
SHA-256: 1a883124e1d0398fd8c378946ddac06594d71f503cab32a2902fb3991eae6eda
font_01_sfnt_off0000ff68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF68 10516 bytes
SHA-256: a549b6d93fc92c3a932e64041e5998c47be483de0b0df5304be81943a3fd67fe
font_02_sfnt_off00012377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12377 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333