Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c7dc9e10ccfba7…

MALICIOUS

PDF

83.1 KB Created: 2021-03-19 05:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1741ff2f3202c92a6c17c4dd561e2d12 SHA-1: 913e347c2372c82b80a2656ca3e7b6dd8bd21fad SHA-256: 98c7dc9e10ccfba7f709788dc276b76303a1ccaadf7a2bbce70413c027b410cf
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or SEO spam. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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/wix?keyword=ffxiv+armorer+leves+70-80 PDF link annotation
    • http://manamuposa.getenjoyment.net/nupuxupige.pdfIn PDF document text
    • https://kumeboxisadinur.weebly.com/uploads/1/3/4/6/134684257/4207879.pdfIn PDF document text
    • http://vavexefane.mypressonline.com/american_pageant_history_book.pdfIn PDF document text
    • https://waramexebogod.weebly.com/uploads/1/3/1/8/131856917/09f81965.pdfIn PDF document text
    • https://gakafapokizi.weebly.com/uploads/1/3/5/3/135319358/9462406.pdfIn PDF document text
    • http://memexeti.66ghz.com/mimikipenawulurifirup.pdfIn PDF document text
    • http://tigadugutuvatix.mygamesonline.org/wikagusoru.pdfIn PDF document text
    • http://votajudizim.22web.org/malaria_parasite_metabolic_pathways.pdfIn PDF document text
    • https://jevogebog.weebly.com/uploads/1/3/2/3/132303093/lukosa-fagamugur-kadanuroz-sutobixavup.pdfIn PDF document text
    • https://rosififobagas.weebly.com/uploads/1/3/1/1/131164218/4e29f4976290e.pdfIn PDF document text
    • https://faliroralomi.weebly.com/uploads/1/3/0/8/130874474/pivokure_noraseximomugom_nelevirodade_bofufuvapu.pdfIn PDF document text
    • http://midorezif.iblogger.org/96666214581.pdfIn PDF document text
    • https://zusifupovososix.weebly.com/uploads/1/3/2/6/132680896/06952c4548.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laganinol.rf.gd/57577016891.pdfIn PDF document text
    • http://kakapefetabol.rf.gd/cghs_card_form_for_dependent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8836f486-8c31-4bbd-9339-4540e424c41a/html_css_link_stylesheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/585a6b6d-fa3c-453a-8b88-2f3c0d7f65ef/40932028618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81a0fa2f-cdc4-462c-b722-9b87275663b0/books_like_the_captive_prince_series.pdfIn PDF document text
    • http://fotiworoz.epizy.com/aseptic_technique_training_manual_for_pharmacy_personnel.pdfIn PDF document text
    • http://nuworeri.epizy.com/petsafe_wireless_fence_collar_wont_beep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf2a2ea2-eb8a-44b3-8ee4-513309ec91b4/what_is_the_formula_for_finding_initial_velocity.pdfIn PDF document text
    • http://rilokewatufev.rf.gd/mizigemasovulos.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_off0001052d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052D 5444 bytes
SHA-256: 4d586836638364e6622d1f5084a7d494387ee50d308106e50228b08703211641
font_01_sfnt_off000117b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B0 11260 bytes
SHA-256: c93b3b987cd407410d9e55305e56c56dec1d654299a6147d463e4d959f17bac6