Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d22bf22d91b1de…

MALICIOUS

PDF

79.8 KB Created: 2021-05-01 12:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6493a31afb4bd0ca2318ce8f761317c9 SHA-1: 1adf795c26239c645c3af36e04e7faf21966752a SHA-256: 19d22bf22d91b1de4ac2d5c16a5e7f3bdd2b6154daf87e6ad3ee2fb8c9ab238c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain metadata related to the 'Ranger's Apprentice' series, likely a lure to disguise the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=ranger%2527s+apprentice+series+royal+ranger PDF link annotation
    • https://cdn.sqhk.co/nezotelo/ZjeVgt1/76602000807.pdfIn PDF document text
    • https://texerazijibegu.weebly.com/uploads/1/3/5/3/135302316/8ef4256.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/kundalini_yoga_books_in_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/dudurejavir/gfJhcVi/5770187258.pdfIn PDF document text
    • http://foxiduwanati.mygamesonline.org/cebuano_dictionary.pdfIn PDF document text
    • http://cuzinfo.ru/85610831118n437o.pdfIn PDF document text
    • https://pusasosabuni.weebly.com/uploads/1/3/4/6/134654602/fejuka_debama_lopomolujamube_gatufedeviko.pdfIn PDF document text
    • http://pagebake.com/how_to_delete_santivirus_realtime_protection_litezdjvd.pdfIn PDF document text
    • http://car-test.pro/mach_4_hobbyqh1do.pdfIn PDF document text
    • https://resumasilazivo.weebly.com/uploads/1/3/4/5/134509929/4883086.pdfIn PDF document text
    • http://hamlikjorettoop.ru/weil_mclain_boiler_e_18_error_codeedjgk.pdfIn PDF document text
    • http://krokoboko3.xyz/34758883273066w5.pdfIn PDF document text
    • http://martans.space/choir_choir_choir_sheet_musicx0g4m.pdfIn PDF document text
    • https://jorojiwelipevo.weebly.com/uploads/1/3/5/3/135393556/veretomofujomer.pdfIn PDF document text
    • http://znasila.ru/education_psyche_reading_answers_ieltssh5xr.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/cad1ebe1-2f3e-47f2-85a2-83ed53e29bcf/roburusesilawazezofot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30245ceb-ebf9-481e-bf21-fb0fec36c646/64701126365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd39259f-1717-4f0c-8958-c6a9cc0f3d44/drills_to_teach_5_out_motion_offense.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/10549615195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b14f5f-56fb-4baa-b0e1-603ef77ddb15/topunawini.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_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 5032 bytes
SHA-256: 109c866ad86028ea180d8f4695734f9714f14594051682f778dae18a789822d3
font_01_sfnt_off0000fdbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBB 10516 bytes
SHA-256: 64967448a5fdda2e27f4f645862173f263bd56fd1b9abccd7123efdc45d65f43
font_02_sfnt_off00012190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12190 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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