Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2e7617392fdc03…

MALICIOUS

PDF

80.8 KB Created: 2021-03-22 16:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9b0a8861592a74ccfe8118e9a933e540 SHA-1: c044b3497f9c1248da760d7f1547fe95ff1e870c SHA-256: cb2e7617392fdc030e33350808cc2548836645143db230b023570a6557c0d2e8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/123?utm_term=informatica+mdm+developer+guide+pdf PDF link annotation
    • https://cdn.sqhk.co/lajawawinu/fJiddK8/canadian_license_plate_game_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/xidafigutoxa/E0sibVA/50341220265.pdfIn PDF document text
    • https://cdn.sqhk.co/bewamufara/hCNijif/wixunuwipezepubulopujata.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/KSUhpie/online_video_player_android_studio.pdfIn PDF document text
    • http://bewizasosu.sportsontheweb.net/77222506758.pdfIn PDF document text
    • https://cdn.sqhk.co/bilexodofose/jfEOe3c/57726121132.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://pigutun.myartsonline.com/polazizitozatuvumewoxovek.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_856d2cee92e648f282fd1e99c921a71b.pdf?index=trueIn PDF document text
    • http://zepizevut.atwebpages.com/kabojusuxiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dedf92f-f349-4803-8360-9c70abd042f4/vizio_sound_bar_dish_network_remote_control_code.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/australian_citizenship_test_questions_and_answers.pdfIn PDF document text
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_a0f5caae410040a1a266d8b8fbaecf99.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/system_design_in_software_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/vobanegizoxug.pdfIn PDF document text
    • https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_54d1052534724a7da485ea993053bddd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf4d25c-c979-4aef-b57f-d355092433f7/essentialism_greg_mckeown_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/a_que_movimiento_literario_pertenece_la_obra_el_burlador_de_sevilla.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/soft_chimes_ringtone.pdfIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_d77753eac22e42d7aad7fda6bb84e109.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fosagoba/80855565555.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/transformers_prime_airachnid_x_oc_fanfiction.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/47174521852.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_off0000f1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AB 5176 bytes
SHA-256: f9fb4d32135034b414d50409eaea35fe779e03e7673133eca317da3458099344
font_01_sfnt_off0001032c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032C 10828 bytes
SHA-256: a87428b8420c93ac759aa03f40c6db6c575dc5d486f6e82cf1a22c78b9004f03
font_02_sfnt_off0001279f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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