Malicious PDF — malware analysis report

Static analysis result for SHA-256 1111a6738862ad18…

MALICIOUS

PDF

80.1 KB Created: 2021-03-24 01:22:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5245e30d3f8f426f0a5ec83da40d9cd SHA-1: 72ada10f0ea839e542ae8bec311ead67999d3ce0 SHA-256: 1111a6738862ad185f3c83d136c402eaa765a79f4a7db884572da3c8f8d1b7fd
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic suggests a scam-based lure, and the presence of a PDF link farm with numerous external URLs points to an attempt to distribute further malicious content. The embedded URL 'https://jumiwimov.ru/123?utm_term=music+sheet+reading' is likely part of this distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jumiwimov.ru/123?utm_term=music+sheet+reading
    • http://rugegav.mywebcommunity.org/fedezerifiwudu.pdf
    • https://cdn-cms.f-static.net/uploads/4476582/normal_6036ccf98bf08.pdf
    • https://cdn-cms.f-static.net/uploads/4385028/normal_602d75ef97840.pdf
    • https://cdn-cms.f-static.net/uploads/4486350/normal_6034384804a2e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fanalejowegop.atwebpages.com/19693291161.pdf
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_8bbca81e36c241abb012be7fbb41be1e.pdf?index=true
    • https://s3.amazonaws.com/kegubinefuda/mulowebewijevogijin.pdf
    • https://s3.amazonaws.com/wibadinavosunom/6574898608.pdf
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_f1be21f572e04cb9b2966c5c5dad8874.pdf?index=true
    • https://502f924d-676a-41b3-8220-87c01882f600.filesusr.com/ugd/5a20bb_ffb747fff60840d9b4f2ce349f6a7a89.pdf?index=true
    • https://s3.amazonaws.com/zaxefemebidaz/medieval_strategy_games_pc_free.pdf
    • https://s3.amazonaws.com/navoburarovada/perioral_dermatitis_nice_guidelines.pdf
    • https://s3.amazonaws.com/pevarijidasalop/lets_hear_those_sleigh_bells_ring_a_ling.pdf
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_f2ff47382e68431991c1f2a6b88e8103.pdf?index=true
    • http://xuxalonitu.onlinewebshop.net/saxosu.pdf
    • https://s3.amazonaws.com/zafijukopa/88025610085.pdf
    • https://s3.amazonaws.com/wupixufekijax/easter_activity_worksheets_for_preschoolers.pdf
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_ccf6c874843740f2a2f45f7c221ec4b6.pdf?index=true
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_c8967e1d37d34dc0874fff52ffb17517.pdf?index=true
    • http://ligujizulogi.atwebpages.com/britax_infant_car_seat_height_limit.pdf
    • https://12c9c681-cafc-4f88-93da-cb6f471fd49a.filesusr.com/ugd/f09a9d_8869c26e310d483896bfbdba7e83cbc7.pdf?index=true
    • https://s3.amazonaws.com/fomudebipefasu/cadbury_instant_hot_chocolate_blend_nutritional_information.pdf
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_7e7f50ba4de049d59b7385cea7ce3fdc.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb71.bin
a3ac00ef9f75f7bdc014078d2bd30ec5f70486a81425d89da2157e9c41da8961		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB71 5172 bytes
font_01_sfnt_off00010d0c.bin
b6211fb32ebc083e3e38885439d52b0b88dcbbf149ee26a2710d6b44e44c33fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0C 11292 bytes

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