Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5c107e8a2f5ba6…

MALICIOUS

PDF

82.8 KB Created: 2021-04-23 20:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c59e39aa5c6ce95e33c9b26adbed6f8f SHA-1: e84f14fe5e6e738bc7bd00501b193162e4d9830c SHA-256: be5c107e8a2f5ba686a1a8b2bb78f94851f79ecb38e71d71cbe52297f98f98ab
186 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection (Pdf.Phishing.Trojan-d2568dad23a94d95) and an ML classifier. It contains a significant number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to book titles, likely a lure to disguise the malicious intent of directing users to external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=the+trials+of+apollo+the+hidden+oracle+read+online PDF link annotation
    • https://masudokunu.weebly.com/uploads/1/3/4/7/134731157/zegelaganubaduguf.pdfIn PDF document text
    • https://foxesusonixuna.weebly.com/uploads/1/3/5/2/135298742/120f583239.pdfIn PDF document text
    • https://bakemelufipunuj.weebly.com/uploads/1/3/4/8/134888112/pogizesojirilov.pdfIn PDF document text
    • https://figiroxofidun.weebly.com/uploads/1/3/0/7/130740151/pugowoto_fafotafutiti.pdfIn PDF document text
    • https://bifitulodagox.weebly.com/uploads/1/3/6/0/136081839/3dca51f556c458.pdfIn PDF document text
    • https://degegoza.weebly.com/uploads/1/3/0/8/130873855/2008255.pdfIn PDF document text
    • https://guverududilo.weebly.com/uploads/1/3/6/0/136086053/6448697.pdfIn PDF document text
    • https://dujolisinapujis.weebly.com/uploads/1/3/4/3/134328324/pugexamazafug.pdfIn PDF document text
    • https://kejarokelevu.weebly.com/uploads/1/3/5/2/135297316/7505440.pdfIn PDF document text
    • https://falopizesolirod.weebly.com/uploads/1/3/1/3/131379111/2285006.pdfIn PDF document text
    • http://bepibolet.22web.org/11048567783.pdfIn PDF document text
    • https://zujedezagepom.weebly.com/uploads/1/3/0/8/130874220/85b5d371bac.pdfIn PDF document text
    • https://kasezikibojeg.weebly.com/uploads/1/3/1/8/131871727/gazabufid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dojidusajotat.epizy.com/rorupose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3914473b-b0f9-44e0-9d57-a70074cb6965/romeo_y_julieta_libro_completo_por_capitulos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb06960-c5dc-4f43-befa-e675cc31e68e/21481643577.pdfIn PDF document text
    • http://widagutevutedik.epizy.com/apparel_industry_journal.pdfIn PDF document text
    • http://sofojosib.rf.gd/flip_book_template_google_docs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc1426da-c439-4ddd-8ec3-06cd50a9e6ec/jamey_aebersold_volume_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34f2bddb-ea30-4bf3-baae-ffcbf6eda929/ryze_scorch_vs_gathering_storm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e630d5-4d5e-4fd3-8252-637f7db151d5/best_human_physiology_book_for_medical_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e4840f6-2017-4be8-99b4-def689abc7e1/46461348745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2489288b-8cd0-4ad7-90f6-22a89e6a7972/7913452838.pdfIn PDF document text
    • http://jixenefotudak.epizy.com/exercices_corrigs_maths_brevet_des_collges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/261d47a4-1c9b-4587-8d37-98a635eac904/mixer_yamaha_mg24_14fx.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_off00010335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10335 5192 bytes
SHA-256: af9e28e83474050dcbde7ca62c5f25eee64f8c68f278d8b4a36f371134b0e4d6
font_01_sfnt_off000114d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D6 11532 bytes
SHA-256: 614b6e659df2f535a49ec3dbb3caa7383a88927b0852c90c49db23785d7bf4f9

Open this report in the interactive analyzer, or submit your own file for analysis.