Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f15948d9d90e7dc…

MALICIOUS

PDF

82.1 KB Created: 2021-04-29 16:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d3a6576d5f5373b585c5861394deb8c9 SHA-1: 254a6752be96639b27ca910ac61022f0294d006f SHA-256: 1f15948d9d90e7dc30c2fa16739a5acf42cb0b485d7e1cc95e99b507ef01a39f
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a redirection or phishing attempt. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a likely attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://leonvi.ru/strik?utm_term=is+it+worth+buying+fossil+gen+5 PDF link annotation
    • http://pogadai.xyz/how_to_cancel_call_forwarding_on_landlineizld4.pdfIn PDF document text
    • http://kudukudimox.sportsontheweb.net/slaves_to_darkness_start_collecting_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/ujjhfjc/lego_legacy_heroes_unboxed_update.pdfIn PDF document text
    • http://lynciguest.com/631992731678mvi0.pdfIn PDF document text
    • http://maturibcgj.space/moxonebiwofisadofunudu2dyi4.pdfIn PDF document text
    • http://klokisik.space/antonio_gramsci_optimism_of_the_will5h9ro.pdfIn PDF document text
    • http://dumigegin.medianewsonline.com/48476855719.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/92831026052.pdfIn PDF document text
    • https://cdn.sqhk.co/welosezu/abYhadw/talking_gina_the_giraffe_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/korulifesewa/pbjf2ED/lodefabanasiwod.pdfIn PDF document text
    • http://uscarinsurance.info/inter_tel_glx_phonesp0axs.pdfIn PDF document text
    • http://blockhcain.host/iowa_duck_hunting_laws8lt35.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3f7af2-94a7-4556-818b-3b8a792faefc/97895259415.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/regonejeviwudonimovejikaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64c5d8d-3140-41c0-a754-ed4f5f1d2b87/check_my_starbucks_gift_card_balance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57d4f17e-8853-48c8-a9b4-e23ee7b09733/dusazokefuded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2e45ba2-da8d-4912-8032-fc3f9ce4b5c6/trane_xv95_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92a043d9-6a4d-4d42-8924-624db47e6fd0/how_to_change_a_belt_on_a_hoover_windtunnel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/711cb427-9cd8-4301-8d5e-12aa57f4e2cd/how_to_hack_ml_diamonds_without_human_verification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759e29bc-ef94-4d74-8ed5-1ed118d949f8/digital_album_design_software_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b02e68a-75c4-4cc7-8d1a-e18826851313/soccer_exercises_to_do_at_home.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_off0000ffe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE5 5216 bytes
SHA-256: 4c4aa2997883ce4ec44e9dcc146824dfa8d1e3312e59044a6a97fade6edd8cf7
font_01_sfnt_off000111c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C2 11776 bytes
SHA-256: ae74b8ae89bc1c3bfca6eee304cd3a9ec1ac474e9643b0adba19b58a3e200b6b

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