Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4917569d861524c…

MALICIOUS

PDF

82.9 KB Created: 2021-03-22 12:32:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1417268ea20f2e28d96520142076c6f3 SHA-1: 00ba2ee7e7a805b1d48dcf3d640a8420aca1b38a SHA-256: a4917569d861524c799b7486e27c205237af12544f7cc082df60f122d587d007
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'baarspo.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'biology questions for neet pdf'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/award?keyword=biology+questions+for+neet+pdf PDF link annotation
    • http://topchambre.xyz/giweramevixezilarigofitl73fe.pdfIn PDF document text
    • https://cdn.sqhk.co/kixeworu/hfKsw8L/negadinifudep.pdfIn PDF document text
    • https://cdn.sqhk.co/dojatejij/idhghgt/gufovezezosaz.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/ggguNii/lugofokox.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/como_hacer_una_introduccion_de_un_proyecto_de_investigacion_ejemplolqnqy.pdfIn PDF document text
    • http://ru-en.xyz/resonance_repatterningc4sq1.pdfIn PDF document text
    • https://cdn.sqhk.co/disanefamu/cISggje/a_blind_legend_for_pc_free_download.pdfIn PDF document text
    • http://verification-help.business/pancharatna_kritis_lyrics_with_swaratrkwf.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/iaE6kij/how_to_get_wrinkles_out_of_paper_tablecloths.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ebdff4-934f-486c-90fe-f17ff5e80903/6886553869.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/50280191252.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/87596264215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/782125f8-7522-4810-b08e-56be84991685/colored_pencil_drawings_tutorials.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/52731045420.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/why_is_my_sewing_machine_making_noise.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/wafuradif.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/8465689801.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/verizon_wireless_prepaid_lg_phones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71cd893-6f28-4cfa-8a79-1675d6bac94c/honda_rancher_350_oil_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54d0261-905c-4cc3-9a39-0273d733a595/fujitsu_fi-7160_error_code_ds42046.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC90 5276 bytes
SHA-256: 8c365c6f066d100a53705c6d3f8020c5bc9a07a0ad48065163e2ac3b2b176be8
font_01_sfnt_off0000fe9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9A 12964 bytes
SHA-256: 1ae72f9401e55e94e8664966ef0272dd49792a5a40bbe18bea3ac0f5c0a49ef5
font_02_sfnt_off000126fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FA 16304 bytes
SHA-256: 0a2507360a40dd56b84230664db2b3a2689cb34b0aa642599c8245950ba374cb

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