Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8343ac95a675b9b…

MALICIOUS

PDF

68.0 KB Created: 2021-03-05 05:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e6b5ccb8125a16aa2c3c372530189460 SHA-1: 57aa10798824059e908ed356be5f203b71901bd0 SHA-256: d8343ac95a675b9b359659a35e411b5f5c583734d2cabb6f627eb64f27f4c6bd
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with one prominent URL pointing to a site offering a pirated movie, suggesting a lure for users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious link farm designed to redirect users to potentially harmful content.

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://maypoin.ru/award?keyword=los+juegos+del+hambre+en+llamas+ver+pelicula+completa+gratis PDF link annotation
    • https://cdn.sqhk.co/xewafazuk/cLjJgVn/ai_dungeon_multiplayer_link.pdfIn PDF document text
    • http://kudopifupelixi.22web.org/90190156390.pdfIn PDF document text
    • https://cdn.sqhk.co/pazibafax/rigQghf/nfl_standings_today_week_6.pdfIn PDF document text
    • http://pokanupat.iblogger.org/honeywell_k4392v2-h_m7240.pdfIn PDF document text
    • http://suvarelis.22web.org/reported_speech_say_and_tell_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/cjfggid/staph_infection_symptoms_skin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ganusigesu.rf.gd/xuzupewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97897856-97d1-4e5e-b67d-1c8436e837a6/correct_verb_tense_listen.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_362a357be2094f668fb17ad8b8d513a8.pdf?index=trueIn PDF document text
    • http://vizumun.rf.gd/rodisigidipuxiparajilofe.pdfIn PDF document text
    • http://nisexugolozefa.rf.gd/suxibezutekudakamopa.pdfIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_d83ff4e5610e4252a2bea99f11db1c80.pdf?index=trueIn PDF document text
    • http://bidasumibave.epizy.com/skype_for_business_2015_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2b0618-2e57-4151-a62a-933babbbc68e/nizujomubijekenitobir.pdfIn PDF document text
    • http://fasokefukolu.epizy.com/biblia_takatifu_kiswahili_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/499a5388-9de0-4754-92fa-155ca2e36deb/royal_mail_international_tracking_contact_number.pdfIn PDF document text
    • http://jatuxijor.epizy.com/why_is_my_tumble_dryer_drum_not_turning.pdfIn PDF document text
    • https://8319d365-0190-44ee-b2f3-e76f6fd230eb.filesusr.com/ugd/112488_790b59d794a242f2a7cb38a76b92b6e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/354c188f-b638-468d-ad5d-6d1a26f0f923/charla_de_seguridad_vial_pilar.pdfIn PDF document text
    • http://bekisamusexasu.rf.gd/16784750172.pdfIn PDF document text
    • http://wobemiko.epizy.com/catalyst_3750_ios.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_off0000c8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BE 5704 bytes
SHA-256: bbf8888b0b969cd479903dea6eab4aae6af89c6fd5965c826cf3ab5e4c6edc6a
font_01_sfnt_off0000dc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 11040 bytes
SHA-256: 868d668dbefe80dbcd151c170f83ff762aa17cea5d8238920d3338b9ebb47538

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