Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ec3e3f01679240…

MALICIOUS

PDF

76.5 KB Created: 2021-03-25 18:36:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: fa26467c45dd984179ee569a1214b64f SHA-1: f4c2fa1a13d36d90128cfea61dd17a8fcd65c625 SHA-256: 74ec3e3f01679240ec11a66598932c99bc57b72df0bd5c94eae7342efbd9d46f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including those on disposable hosting, suggests a link farm or distribution mechanism for further payloads. The document body, though heavily obfuscated, contains references to 'irregular verbs worksheet grade 5 pdf' and 'minecraft hypixel zombie apocalypse map download', likely serving as lures to trick users into clicking embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=irregular+verbs+worksheet+grade+5+pdf PDF link annotation
    • https://cdn.sqhk.co/papusabefo/ggigLGS/minecraft_hypixel_zombie_apocalypse_map_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mivuxakadu/izUeWq0/create_running_route_map_my_run.pdfIn PDF document text
    • http://gurerawe.22web.org/bulej.pdfIn PDF document text
    • http://rimaloxal.22web.org/52798319613.pdfIn PDF document text
    • https://xowemaxixedire.weebly.com/uploads/1/3/5/3/135325030/8c64d063e2a7a2.pdfIn PDF document text
    • https://goxapumub.weebly.com/uploads/1/3/4/8/134884232/wolozilaj.pdfIn PDF document text
    • https://ranitezal.weebly.com/uploads/1/3/1/4/131438109/f618d43f2f1603c.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/Zjfexji/animal_jam_codes_for_sapphires_2020_april.pdfIn PDF document text
    • http://pakavoposot.22web.org/how_to_reset_liftmaster_893max_remote.pdfIn PDF document text
    • https://gekubunog.weebly.com/uploads/1/3/4/2/134235395/4864454.pdfIn PDF document text
    • http://fimuvukabiwijad.22web.org/kuxarorutubebo.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
    • http://damatagowigiz.epizy.com/madikapeg.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/pokemon_yellow_gameboy_color_emulator.pdfIn PDF document text
    • http://gesinofafag.epizy.com/11760410573.pdfIn PDF document text
    • http://boraxatisota.rf.gd/dusiwogexepofezu.pdfIn PDF document text
    • http://livajurusurex.epizy.com/batch._psd_to._jpg_converter_free.pdfIn PDF document text
    • http://tadigolunus.rf.gd/xuzomopuwidovexeva.pdfIn PDF document text
    • http://fowasabitafal.epizy.com/bedias_platform_bed_king.pdfIn PDF document text
    • http://nubejapowij.epizy.com/dizagekebenilona.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/authority_matrix_format.pdfIn PDF document text
    • http://ziwejozaz.epizy.com/38242792739.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_off0000decd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECD 5448 bytes
SHA-256: 670a7e0b3e57746495c1dae2f28a1b7d2cf0b6c4163180ed9feebaf3211c98f9
font_01_sfnt_off0000f17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17E 10640 bytes
SHA-256: 3e3f0ce6e0bdabcad34160f8f448732efc6afdd0332d2dcf699684cb70b1b333
font_02_sfnt_off000115f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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