Malicious PDF — malware analysis report

Static analysis result for SHA-256 74830825c8d8aa31…

MALICIOUS

PDF

69.2 KB Created: 2021-05-14 05:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 69be4cce1e23f343c362e84ff0b5f613 SHA-1: 77d6435b6442f3d72d25900ac0129d1f3b86ea13 SHA-256: 74830825c8d8aa312cefa001d1805e3fc77c1bf7180f68ef4ca0a4ce0924c129
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body contains a disguised search query for "sodastream co2 refills", which is used to mask an external URI pointing to a suspicious domain. This suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/strik?utm_term=where+can+i+buy+sodastream+co2+refills PDF link annotation
    • https://cdn.sqhk.co/vuvesanap/xdRibjg/real_steel_toys_noisy_boy_for_sale.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/bangalore_kanchipuram_otobsr06yf.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/epidemiologi_penyakit_jantung_koroner.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/cNhiCmh/hornblower_audio_books_in_order.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/djbTghg/bobemag.pdfIn PDF document text
    • http://tryraisins.club/kufobewel29cun.pdfIn PDF document text
    • http://usacarins.com/d-link_dir-655_admin_passwordpchqw.pdfIn PDF document text
    • https://cdn.sqhk.co/gatidixon/doihjdr/my_city_pajama_party_free_download.pdfIn PDF document text
    • http://kedepoba.sportsontheweb.net/quantitative_risk_management_concepts_techniques_and_tools_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xawowaguka/ZgmJieI/5277241834.pdfIn PDF document text
    • https://cdn.sqhk.co/vomemubevu/ugigeMm/world_clicker_idle_clicker_games.pdfIn PDF document text
    • https://cdn.sqhk.co/sixojifez/agfygdR/zombie_frontier_sniper_mod_apk_v1._27.pdfIn PDF document text
    • https://cdn.sqhk.co/watexoba/hiQ8jhi/mulumezut.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/Xidjcjj/snes_classic_controller_walmart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/chronic_myeloid_leukemia_mechanisms_of_blastic_transformation.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/vuzuwadodatelaxosida.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/zabemezunevazip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cca53164-df81-4f1a-b1de-4a997c007807/an_introduction_to_mathematical_reasoning_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/browsing_history_on_android_google.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79aeda83-00e0-4e08-9ca2-a6a9fb296435/vox_ac15_head_handwired.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/android_developer_jobs_in_bangalore_domlur.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_off0000cef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF1 5648 bytes
SHA-256: d3a7dd46c4b5a354d569cf3dd6a5483f283777ed233da19885f88bf867bb02d5
font_01_sfnt_off0000e20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20D 11048 bytes
SHA-256: 792bfacd88f526f4e18fec7b1f90378ad0dc45cd9d984f3edee9d5d3a806b16d

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