Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46832f70e423e20…

MALICIOUS

PDF

87.3 KB Created: 2021-04-06 03:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c4f4502a59ef7c9ad9de152bcf9704bb SHA-1: 552ebf0d24d5ddb927840626db1395c68f5fd07f SHA-256: d46832f70e423e20a8421598203d0cf3820c4757c67de1c5b4dc4015ae0db3b6
164 Risk Score

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/123?utm_term=android+tv+box+software+update PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/the_four_temperaments.pdfIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_29f047f824084ae0abc3170e186417f3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pidufozu/bagazujiwumumezonaxebefuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f5dd5bf-00aa-460f-91bc-f2d44123cd8f/jenexafotede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fb1e5f9-5e59-4547-90d4-08853d29962e/order_ikea_catalogue_2020_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca61b2d-cbd6-448a-a461-b0bbf6fb6c67/50503959562.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/luxury_linen_bedding_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dc05645-0d4b-40ce-be0b-83e9124f1ca8/iso_31010_standard_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce03f026-7eca-4947-86e1-e98feeaf096a/14741890972.pdfIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_218325616a674582821bc49f2ad0058e.pdf?index=trueIn PDF document text
    • https://033f1a72-e514-447f-b44b-9d234b37386c.filesusr.com/ugd/f05202_4fcfaabf878f4f02a0079d0cd91d4082.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/07b78379-a491-459a-b4bf-36ebfc2d50f6/bissell_proheat_pet_12_amp_manual.pdfIn PDF document text
    • http://bozojugejev.epizy.com/adding_dissimilar_fractions_worksheets_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/daintree_self_guided_walks.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/juxesabuxuminipixogaf.pdfIn PDF document text
    • http://raseloxezonavo.epizy.com/airtel_bill_by_relationship_number.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/wajorinizejalow.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/rudewozosanisevezu.pdfIn PDF document text
    • http://xumugipetoje.epizy.com/fractional_distillation_worksheet_gcse.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/lewuwomidirawokipujowute.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/apostrophe_worksheet_paragraph.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/39213065268.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_off000110a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A6 5352 bytes
SHA-256: 5f46bebc799aea972746cd08f23f4ac5005643a0a31aecd112adae2e0a671afe
font_01_sfnt_off000122f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F7 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00012b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B84 10660 bytes
SHA-256: 8341352d2ea6b6468d325e66c68497c635b99f5df8b047adcd6e5b018da3f284