Malicious PDF — malware analysis report

Static analysis result for SHA-256 0097240a095477da…

MALICIOUS

PDF

65.8 KB Created: 2020-11-22 02:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8c530c627718b8c3ea21afafb30b1b11 SHA-1: 14ef1a4253ea9c9b3cc2863d86eb52261b63050c SHA-256: 0097240a095477da5a269eabb82df38a6b1affeded8fa7d1ba3549ea1b6275d4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and external links suggest an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/aws?utm_term=plant+virology+5th+edition+pdf PDF link annotation
    • https://razisosip.weebly.com/uploads/1/3/0/7/130739291/a5e2bb02a99e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f8865e12edc2.pdfIn PDF document text
    • https://juzoliposiwe.weebly.com/uploads/1/3/4/3/134322138/busawirezisilef.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/2554a4ab-1d54-445f-963d-a2b2d5aa7ca4/pnc_bank_lobby_open_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2faf07bb-1e81-454e-8bf2-b3d411dc44bc/volume_and_surface_area_of_spheres_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d16445e4-96af-49fa-89b4-ed38d98972dd/pixofelevazewotek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f911cce-03b7-4d49-b97a-38434aca4ce8/comptia_a_cheat_sheet_901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe5688c9-c3f8-49a9-afe1-b6f0e3dd232a/93166831937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06578902-84fb-4bba-9573-64d20295730a/channel_myanmar_21.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/gexenejiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7afb7e94-8a56-4341-9e32-a78355cb92a5/schwinn_ad2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/vokozoliwase.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_off0000c2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BC 5412 bytes
SHA-256: 92ba9745eba664af15d420c7153bba04707f65c3a790b17506caba9a31c70d73
font_01_sfnt_off0000d532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD532 10412 bytes
SHA-256: 6bc5c9df86a9c230b3ea7052e644279e7a6f4a0212dc8d9b1bcf33489883847b

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