Malicious PDF — malware analysis report

Static analysis result for SHA-256 d36475bd4525fa5c…

MALICIOUS

PDF

82.4 KB Created: 2021-03-08 23:00:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bc3a341049e2a3c1ee7360385503408b SHA-1: 57a8eda9f7db4c88481dc28eccff8453ac819a9e SHA-256: d36475bd4525fa5cb40188c7e884ab3a4a3e397d29b2d689a30b79d28a01b1ea
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9991

Heuristics 5

  • 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 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/aws?utm_term=rheem+315+litre+electric+hot+water+heater+price PDF link annotation
    • http://wukifiduputafeb.22web.org/icloud_contacts_sync_android_app.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/what_is_quantum_tunneling_simple_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505837/normal_602b85b071a0c.pdfIn PDF document text
    • http://tometifo.getenjoyment.net/25475814241.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489587/normal_5fc757d105c7d.pdfIn PDF document text
    • http://mirijesuwakug.sportsontheweb.net/biwowibejegit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425908/normal_5fd1635a8364b.pdfIn PDF document text
    • http://meroxisawifagu.mygamesonline.org/73320030179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_600e05f92c218.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/the_golfing_machine_book.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/rumunobutolaset.pdfIn PDF document text
    • http://rawiduti.medianewsonline.com/can_i_move_my_fios_router_to_a_different_room.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xobibaga.myartsonline.com/33502349665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fdf7755-7f86-43a2-90b6-c1087009fb93/american_history_books_written_before_1900.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/40384747157.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/best_fenix_6_watch_face.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29bc95bc-0617-4f67-828f-10afd2f8a6fc/why_my_acer_tablet_wont_turn_on.pdfIn PDF document text
    • http://xogijowag.onlinewebshop.net/mititu.pdfIn PDF document text
    • http://sewoxoxitif.rf.gd/38621440206.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/kabololiroduzutifimu.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/22350605971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0277cc3c-aad2-4a61-957c-0feca90ed298/nemesis_polarized_safety_glasses_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eeaa858-3755-412f-9987-ec8b7544b258/saunders_nursing_drug_handbook_2020_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/difokidokukugubif.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_off00010382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10382 5432 bytes
SHA-256: 6c1c5918ed0d4e1d6635bf663bd836641918eb238e18da43d3bcd18e41835a34
font_01_sfnt_off000115f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F6 11044 bytes
SHA-256: a9b28803d9137467152a5a120d4b90429c2a1910c696137517af8e94195579a0

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