Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2786811b01d760…

MALICIOUS

PDF

81.6 KB Created: 2021-03-14 14:50:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 69d9c5f699e559073244c89affee7779 SHA-1: ea7f40d203a9c3a8f21b0699daab3f99efe09ff3 SHA-256: be2786811b01d760c1885854c66e4912fd7fe9b82b0298dbef8536412d24ba93
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/123?utm_term=cartoon+yourself+free+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407749/normal_602a100292d3c.pdfIn PDF document text
    • http://youtube-subscribes.com/13893751364lquqx.pdfIn PDF document text
    • https://teribupugabi.weebly.com/uploads/1/3/4/8/134852699/4943661.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388065/normal_5fcb4d8591b1a.pdfIn PDF document text
    • https://jepuderakemuso.weebly.com/uploads/1/3/4/6/134666912/jinaguwimik-mojegafopidiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484807/normal_60322b1b11c09.pdfIn PDF document text
    • https://lenatazuponos.weebly.com/uploads/1/3/4/8/134888684/satasilamojiwanetas.pdfIn PDF document text
    • https://jenisevemib.weebly.com/uploads/1/3/1/0/131070602/9114666.pdfIn PDF document text
    • http://extrameets.fun/handloom_bed_sheets_manufacturerstuhxs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://691dfa98-c543-4342-b77d-a3d7fbf094aa.filesusr.com/ugd/d55835_88e563915ca545ff93d821e7dccf9f58.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/ccsds_telemetry_packet_format.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/11800446556.pdfIn PDF document text
    • https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_f704580665934b40bc2acf62935fa8f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/mathematics_questions_and_answers_for_primary_3.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/guide_lucian_8._23.pdfIn PDF document text
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_fc3f00b6116c4954a515cc634b83769b.pdf?index=trueIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_5aa16e3e86ce48d39ca4672ccb7eaa54.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dukajevo/batadife.pdfIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_ac3f2105036d413b9855dbd25f295ad3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/38169308973.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/agile_roles_and_responsibilities_matrix_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/best_chess_opening_for_beginners_black.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_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 4964 bytes
SHA-256: 53bc7f2080382310a56537b3ccf117d2a94dc86823f552b145151b9435dded27
font_01_sfnt_off0000fa25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA25 11764 bytes
SHA-256: 429b279c8cbb2990212a4b80492f1a7cf74bdbab740222a351dcb900bd30ed4b
font_02_sfnt_off0001223c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223C 16592 bytes
SHA-256: b7096b8ff19107b0e7a82023df9542ef09add1417cf7323eb0e3edb81918a5d2

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