Malicious PDF — malware analysis report

Static analysis result for SHA-256 68226484a1051603…

MALICIOUS

PDF

83.9 KB Created: 2021-03-24 04:56:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2dcdf338e3e80709b432b0829fcdd783 SHA-1: 85b29b20811e90a254580738aec97026d53a9005 SHA-256: 68226484a1051603efb6055060c14c607cee03b75c0bcf32e83a0e2676c43dff
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, zajinet.ru, which is likely used for distributing a secondary payload or conducting phishing. The document body, though heavily obfuscated, contains text that appears to be a lure, referencing 'boy scout bear song'. No scripts were extracted, but the presence of an external URI and the malware detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/aws?utm_term=boy+scout+bear+song PDF link annotation
    • https://cdn.sqhk.co/naluloli/pihhbgc/poxuwokokanifi.pdfIn PDF document text
    • http://limecash.xyz/score_hero_full_hacked_apk9l2nf.pdfIn PDF document text
    • http://salearea.pro/nilopojuwurukojeguwewed5oerq.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/ekhf8ig/influencer_marketing_hub_twitter.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/analise_de_dados_qualitativos_e_quantitativos.pdfIn PDF document text
    • https://cdn.sqhk.co/samofetob/jgiaVx2/xiwukifimu.pdfIn PDF document text
    • http://uablog.site/kasarian_ng_pangalan_worksheets_grade_3r7j4b.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://jimomurapujivo.onlinewebshop.net/85434295257.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/faber_piano_adventures_primer_lesson_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10932801-b2e3-4e2d-8b26-824dbd136a6d/7131256760.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/37559472626.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/95664518282.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/68212364386.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/cartoon_face_png_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5499ff98-bcdc-48c1-8135-783f8b199b32/how_to_fix_a_wine_fridge.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/playerunknown_s_battlegrounds_key_activation_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/sotufonipatakawuworola.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/the_big_short_netflix_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/how_to_calculate_gre_score_percentile.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_off0000fc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC27 5060 bytes
SHA-256: 9faaf6e901f320d02f6bc8d7a7c5d95b4dcec78b48388a47d7645a6417814b1f
font_01_sfnt_off00010d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6E 11112 bytes
SHA-256: 47113c2027887555632b35bb2fde7409d68f1d9f713a187c56916a765b7671ca
font_02_sfnt_off000132e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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