Malicious PDF — malware analysis report

Static analysis result for SHA-256 68beebdca8b4fc73…

MALICIOUS

PDF

92.4 KB Created: 2021-05-18 13:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 065f31722f8505077d2874bbc5d29671 SHA-1: 227b349d509d0549b2362e9778288472d3c94944 SHA-256: 68beebdca8b4fc73e975f233f8f4cb4854fceadd7aafd61d6708454a334cc1dc
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm. This technique is often used for SEO manipulation or to distribute malicious content. While no scripts were directly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to potentially harmful sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://sokudepan.weebly.com/uploads/1/3/1/8/131871622/gawikoxowe.pdf In PDF document text
    • https://nazasakodaz.weebly.com/uploads/1/3/4/6/134667833/8820671.pdfIn PDF document text
    • https://gatodewa.weebly.com/uploads/1/3/4/6/134627503/2ef88cbf486d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/o_fyKxYoRT8/wb?keyword=atwood%20hydro%20flame%20furnace%20wonPDF link annotation
    • https://s3.amazonaws.com/medaliwifufugel/wewopeliki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd34f2e-464b-43aa-984f-a3b03ec3f3bc/husqvarna_450_rancher_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/151c1395-fc8a-4c7c-aad3-041679c55f5b/jizoteme.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/why_wont_my_echo_dot_3_connect_to_wifi.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/wamabukakomewixexosa.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/40002644968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6661f384-620c-471c-ac29-cbf11b8e94e2/how_much_does_it_cost_to_rebuild_a_350_turbo_transmission.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/1830250800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af0805d0-bd9e-479f-919a-64bae32e9ee4/baofeng_long_range_walkie_talkie.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/64466771809.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/inteligencia_emocional_concepto_daniel_goleman.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/come_avere_vsco_x_gratis_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f250372f-842e-4047-bbc9-47c8816ecf59/final_fantasy_tactics_a2_recruitment_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76986561-3534-4ce4-9ef3-b93994dc9b79/96703246551.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/makalah_akuntansi_pajak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b11a8d-9dc1-4365-8812-7889219c7268/derecho_procesal_civil_requisitos_de_la_demanda.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/boatswain_mate_second_class_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/78838668206.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_off00012c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C40 5300 bytes
SHA-256: 62820a80855c8df203231bad0392bb816b9e3282005a7faedcc6f222f0549ef7
font_01_sfnt_off00013e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E3F 11112 bytes
SHA-256: f4a3ea5809bded6fdca912d5be5535dae10cb17f8728a02fccf51497ef8bdf7c

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