Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b45cd4040a88694…

MALICIOUS

PDF

73.9 KB Created: 2021-06-05 23:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d3b1d06afdee78523e892be5019f8231 SHA-1: 6aefd3dd81d4f1a138b5c9ff4976b2765f5215ef SHA-256: 9b45cd4040a88694f525d1c37bff3644630b30ad65c6821f9674173cb4954279
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one specifically pointing to a 'naruto online trainer hack download', suggesting a lure for users seeking cheats or exploits. The PDF's structure and link farm behavior further support a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://cructi.ru/pbw?utm_term=naruto+online+trainer+hack+v1+5+download PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4413455/normal_60b617099dcf2.pdfIn PDF document text
    • https://kefenageteda.weebly.com/uploads/1/3/0/7/130775977/5964607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408324/normal_60553485a69f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_6009f69141de3.pdfIn PDF document text
    • https://mimexivurevup.weebly.com/uploads/1/3/7/5/137500026/xiguxuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_60694e2a49cd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500679/normal_6047b5b66dfca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387408/normal_605be201d1fe4.pdfIn PDF document text
    • https://zimuvudiredefux.weebly.com/uploads/1/3/2/7/132710782/biwelubug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402932/normal_5ff8266c3790c.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/kalile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_6037347679295.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423699/normal_5ff4dd482c35c.pdfIn PDF document text
    • https://vowomupow.weebly.com/uploads/1/3/4/8/134846305/4629068.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xosufixemuf.pbworks.com/f/how_do_you_workout_with_broken_wrist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adf17a32-3a8d-43d3-9683-647b504c7b16/marzocchi_bomber_z2_29_axle_to_crown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d1c0b47-c991-49a9-814c-984955760b09/39298947008.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/w/file/fetch/144647433/girijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/583df3ad-0089-446a-9832-d616e0975e96/zoom_g3xn_multi-effects_processor_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9acafb31-d7d0-457d-a219-2ef579a5428f/wiring_a_hot_water_heater_timer.pdfIn PDF document text
    • http://bojirakaj.pbworks.com/f/77324227122.pdfIn PDF document text
    • http://nugewus.pbworks.com/f/financial_accounting_an_introduction_pauline_weetman.pdfIn PDF document text
    • http://tagexoba.pbworks.com/f/isim_sfat_zamir_zarf_konu_anlatm.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_off0000e445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE445 5208 bytes
SHA-256: a63311ec8c9c59ef39ade129ecccddc7da875ea96e2f316f4231fa9b068102ed
font_01_sfnt_off0000f618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF618 10492 bytes
SHA-256: 011a12c3ac0f91bb2054fb5feb668027034ce4914a3593f29616ff5c9ffb2d2b