Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf6915f948d428b…

MALICIOUS

PDF

90.1 KB Created: 2021-03-22 13:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f3d9d00e8444ddeef88b2e4c9683ed8d SHA-1: 423bb5eb4d708d42c21ad7657d4819e4caaa8472 SHA-256: ebf6915f948d428bad069ff7ad2c48b211ae18845e73df2d6d938b63b6b7627b
196 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, using SEO-optimized links to redirect users to external resources. The PDF contains numerous links, many of which point to Weebly-hosted PDFs, suggesting a link farm or a method to distribute malicious content under the guise of legitimate documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://xezojetit.ru/award?keyword=definition+of+charismatic+leadership+pdf PDF link annotation
    • https://rukifutotusiz.weebly.com/uploads/1/3/4/6/134685592/lugef.pdfIn PDF document text
    • https://cdn.sqhk.co/kokizoxujojo/rthHggc/3d_pool_game_free_download_for_pc.pdfIn PDF document text
    • https://bizudabug.weebly.com/uploads/1/3/4/7/134722823/solavemigixelun.pdfIn PDF document text
    • https://dadekubezaxinis.weebly.com/uploads/1/3/2/7/132740399/zeseg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414852/normal_602c41fa52832.pdfIn PDF document text
    • https://cdn.sqhk.co/pagozixupezi/fMIMghw/gabirodu.pdfIn PDF document text
    • https://baputopozim.weebly.com/uploads/1/3/5/3/135336161/d9d6b1bf5ef522.pdfIn PDF document text
    • https://namavikevak.weebly.com/uploads/1/3/2/7/132740743/witozijafiwu_tajulejo_xabiwuwet_takugavilotoguz.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/hxPjhkR/plants_mod_for_minecraft_pe_gun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490720/normal_600416db561a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_6049917522441.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389821/normal_5fcbb8eaf20d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408701/normal_5fe8ffac2ef48.pdfIn PDF document text
    • http://kawafopi.mygamesonline.org/anaesthesia_drug_doses.pdfIn PDF document text
    • https://cdn.sqhk.co/budotedo/czHhcic/slow_motion_editor_app_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jepinebawo/analog_circuits_and_signal_processing.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/can_h2s_form_hydrogen_bonds_with_water.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/the_princess_bride_book_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/halloween_phonics_worksheets_2nd_grade.pdfIn PDF document text
    • http://tikeresepujel.onlinewebshop.net/notumo.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/gimifaxeguwupana.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/denon_avr_x4100w_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/after_effects_cs6_free_64_bit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DE 5184 bytes
SHA-256: e61001f3318b5fc8321726d2b3bb8d08e224c8f30cfe663f2712e0bcc7426919
font_01_sfnt_off0001264f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264F 11360 bytes
SHA-256: a4e81646429aec33436847c6ff68658e65163c198944d9413e214369503f8d40
font_02_sfnt_off00014caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CAA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3