Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bcd45348c05b07d…

MALICIOUS

PDF

94.7 KB Created: 2021-05-10 12:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7c04fc3d48de1c482dca47ea20b0d6ca SHA-1: 74843f61651d8c17f76ec3d31c4e964be2bbca12 SHA-256: 2bcd45348c05b07d98538601f95d0a750a68c382bf83d0625b67a747255a96a9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and a high ML classifier score indicates malicious intent. The ClamAV detection as Pdf.Phishing.Trojan further supports this. The document body, though heavily obfuscated, suggests a lure related to educational content, likely to trick users into visiting the malicious external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/strik?utm_term=soapstone+the+gettysburg+address+worksheet+answers PDF link annotation
    • http://rawitotizoxuk.scienceontheweb.net/58757631089.pdfIn PDF document text
    • http://doxewoga.iblogger.org/giant_werewolf_5e.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/devazolujemebokelegizon.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/KiiZhdb/bombay_dyeing_bed_sheet_king_size_online.pdfIn PDF document text
    • http://dojegegitotebe.22web.org/probability_questions_for_class_10.pdfIn PDF document text
    • https://cdn.sqhk.co/tujarazimok/gejnNjL/rewipidogepogofil.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/hcJphg1/2236834950.pdfIn PDF document text
    • http://erogan-columbia.site/serato_dj_pro_download_for_windows_76y0h1.pdfIn PDF document text
    • http://sq11mini.com/the_transactions_of_spade_company_appear_below_quizlet6auq6.pdfIn PDF document text
    • https://cdn.sqhk.co/kixituvelil/ce4thae/sound_of_the_sea_movie_online_full.pdfIn PDF document text
    • https://cdn.sqhk.co/fezavomol/pq99jew/swing_low_sweet_chariot.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://uploads.strikinglycdn.com/files/f7704f4b-e632-41f9-a9c2-afce73040f3f/37296793133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e7b1e15-dcc4-4346-9922-6f8aaf37f580/the_conversion_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b553fc5-35d5-43ea-bf98-1fb44a0cf8f3/semudetasizoxobudapuvili.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/chhota_bheem_video_tamil_song.pdfIn PDF document text
    • http://mimonutemabase.epizy.com/11490688908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b152dc-5339-4bb3-9ad9-af3472b04717/ximeraganolezolaradawe.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/mastering_physics_components_of_vectors_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/578a1c4a-d580-41db-8994-7269312cc355/lezojarebaletuxefa.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/steam_api_init.pdfIn PDF document text
    • http://veratab.epizy.com/32055994945.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8B 5524 bytes
SHA-256: a951d526332430b9883bbc0b36352d07cc66242360b1c9c6cb6b2cbb6a7dc46c
font_01_sfnt_off00012e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E41 2052 bytes
SHA-256: 45161600c168cb86abea0d582939cff7e26865ccef696145a84b56b2745b4fe2
font_02_sfnt_off000136f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F6 11124 bytes
SHA-256: dc76c52eeb326cbfc3e89f83ba90eecb21650b15ff6b29c742388bdbc82db01b
font_03_sfnt_off00015cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CD6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378