Malicious PDF — malware analysis report

Static analysis result for SHA-256 5438225d56764969…

MALICIOUS

PDF

74.9 KB Created: 2021-03-21 08:14:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7d7d9faea60cb35eddb3e211476f6d33 SHA-1: 1d840c5a45eed31df416f65b7446a19a303a5cbe SHA-256: 5438225d56764969f6bebfc5030479b971265b291a08890eb2aee26d5db54d14
186 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 ClamAV detection for Pdf.Phishing.Trojan. The document contains a large number of external links, many pointing to disposable domains, suggesting it is part of a link farm designed to redirect users to potentially malicious sites. The embedded URLs and the overall structure indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/strik?utm_term=how+to+unfreeze+a+vintage+sewing+machine PDF link annotation
    • http://immorta-cross1.club/71721991407ftc51.pdfIn PDF document text
    • https://zexiditituluw.weebly.com/uploads/1/3/4/7/134734655/baroxi_sovududes.pdfIn PDF document text
    • http://antinomi.design/69466463441pjqqz.pdfIn PDF document text
    • http://okrasote.info/bliss_os_32_bit2pb7h.pdfIn PDF document text
    • http://fugilugidijud.22web.org/rrb_cen_01_2020_notification_download.pdfIn PDF document text
    • http://reduslim-official.website/macroeconomics_gregory_mankiw_8th_edition_free_downloadfw4id.pdfIn PDF document text
    • http://viputixezererej.66ghz.com/khaab_harshita_song.pdfIn PDF document text
    • https://tijirurilulade.weebly.com/uploads/1/3/4/3/134312421/a950ca46cd4d7.pdfIn PDF document text
    • https://donikigegetala.weebly.com/uploads/1/3/4/3/134311768/fefuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xazasanedaned.epizy.com/can_i_use_my_own_coffee_in_a_nespresso_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/alone_in_the_wilderness_full_movie.pdfIn PDF document text
    • http://vusatalejud.epizy.com/how_to_find_out_your_post_office_account_number_discount.pdfIn PDF document text
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_5120d1ca906f40feb3c3ba55c590824c.pdf?index=trueIn PDF document text
    • https://9b321a86-0615-40a7-b684-6dced782f4cc.filesusr.com/ugd/e3cae3_84e63988def14c428ae46579ee8005e9.pdf?index=trueIn PDF document text
    • https://12c9c681-cafc-4f88-93da-cb6f471fd49a.filesusr.com/ugd/f09a9d_79e1fcf671fa4c2ea160d68207174842.pdf?index=trueIn PDF document text
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_13de946f83b64e1f8ce6cd95d2b61882.pdf?index=trueIn PDF document text
    • http://webomaka.rf.gd/89998167950.pdfIn PDF document text
    • http://zezazemana.epizy.com/best_cryptocurrency_trading_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/acupuncture_patient_intake_form_template.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_off0000e608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE608 5424 bytes
SHA-256: b2437aac82091a942c677160b82d32e31b4c9c0d198a5f9bf66fe94f87df7c2f
font_01_sfnt_off0000f878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF878 10536 bytes
SHA-256: 3e4853115b87c55c5af0da61f359be4fdbf3469afbc2629b6da1696cc1bf9177

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