Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8416baf206d6a41…

MALICIOUS

PDF

90.2 KB Created: 2021-03-19 04:52:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 7f716747ea88828cc754c691ee40007e SHA-1: 9c8015e163b7507e19909de338409603b80bc0fa SHA-256: d8416baf206d6a410df7ae808cea73d7beff08f5c508bec90893a8930e5c9d5e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. One prominent URL, 'https://botokaw.ru/wix?keyword=litton%2527s+weekend+adventure+logopedia', is likely used to redirect the user to a malicious site. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the classification as a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/wix?keyword=litton%2527s+weekend+adventure+logopedia PDF link annotation
    • http://twoup-viktoria.online/a_knight_s_tale_scriptty2e2.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/gdhhhbf/kugupofazepawuji.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/djciiii/hearts_fc_news_bbc.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/marvel_legends_infinity_gauntlet_thanos_figure.pdfIn PDF document text
    • http://pixubak.iblogger.org/mimumukunakadogesukuje.pdfIn PDF document text
    • http://savadaqwe.space/crossing_positive_and_negative_jumper_cablesbqe7l.pdfIn PDF document text
    • http://ropisunofo.mygamesonline.org/60702356111.pdfIn PDF document text
    • http://vunixifatirami.22web.org/43030697053.pdfIn PDF document text
    • https://cdn.sqhk.co/pawosuku/YuHje53/truck_simulator_usa_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/hgbjaic/lagonixet.pdfIn PDF document text
    • http://trickyturkey.com/horoscopo_de_hoy_capricornio_por_profesor_zellagrooo1cv.pdfIn PDF document text
    • http://copyrightshelpcenter.com/farmer_refuted_sheet_music52n1x.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/wizitifowubux/reporter_live_photo_bangla_video_gan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1404098-7d8c-437c-8d4f-922561d1575d/presto_cooker_canner_number_7.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/32108499712.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/naxub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51fb6b14-f6ef-4cf6-8b2f-60ffe0553395/amplifi_tt_footswitch.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/difference_between_abbreviations_and_acronyms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e626bd9-8909-4bee-b186-ebd279516d01/89639704625.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/white_rodgers_thermostat_1f80-361_wiring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c6dd05d-a5df-4645-88be-79849a8e2e65/how_to_start_keto_free.pdfIn PDF document text
    • http://jekiwoko.rf.gd/dovunob.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_off0000f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52F 13540 bytes
SHA-256: b117dc9b9e12558ff504e23308e005cb2f91575c7b9e45a456dc3181bc96e77d
font_01_sfnt_off0001216b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216B 5316 bytes
SHA-256: 43ee94b41bb42ca78cbeae64d840c92e3138bdb1668f49a0230948a8ed3cbd4c
font_02_sfnt_off000133bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133BB 11588 bytes
SHA-256: c92f1a47aa134439739dba82eef7a36fca3496262f01c8cda074d3ee6ba65c2e