Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad1bcbbe7841303…

MALICIOUS

PDF

70.8 KB Created: 2020-11-13 09:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 85724129bdfc1fd58cf261df1df1460d SHA-1: d8f302959f806e5d7ae191f2c1bb789fb71c6da4 SHA-256: bad1bcbbe7841303192f26e199ae2af76464d157769a3b1872dca3981f7cb702
164 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 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 0.9998

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://traffine.ru/strik?utm_term=how+to+setup+minecraft+vr PDF link annotation
    • https://kakakirikixego.weebly.com/uploads/1/3/4/3/134318951/9b68aeca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387706/normal_5f98ac6df281a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vigevot/78567613992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43369637-7734-4e7a-9d67-78aa303a40ba/68341621097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b90daf6-869b-4a5b-9d95-98779f0596a6/13294835692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f7736b-cc1b-4293-bb27-22d7b54759b3/g4ap0500_thermal_fuse_lowe_s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be299e0b-4ac3-43cd-8286-21827537b01b/moonlight_sonata_piano_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f697d7-955a-416c-80e0-9e2b9680c381/jasug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d297c910-cc6d-4b66-8767-e18f8e0d6c57/graham_elementary_school_in_tampa_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb81fa32-e8f4-48ae-a43e-3798765a3d08/semewatexuvopinujebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbfb9fd4-4a00-455b-87c8-a41bcd4cb0d8/banjo_and_mandolin_duo_tabs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c9d955e-3899-4292-90aa-e7eacc7ff328/jivitusisoravuxokarifubad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35b459ca-09fd-41ec-9bda-ee0d710a9538/hamilton_county_auditor_org.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad954a1e-4061-4288-b1c5-5fbeb5f81873/blog_de_libros_juveniles_para_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/22882943720.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_off0000c938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC938 5124 bytes
SHA-256: e2c582a6a970a783dc79fcbe3fae76d4a9164210af814c1b082c3833887254f6
font_01_sfnt_off0000da9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9F 11380 bytes
SHA-256: b0b50398ebb586038ea6d89a9ae52171561804c161e522d3ea59bdc28a14b82d
font_02_sfnt_off0001007c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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