Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9d6b798009bc65…

MALICIOUS

PDF

73.6 KB Created: 2021-03-16 03:02:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 45f17b0e17724eebec4dcc7ae5c60e2e SHA-1: 216e60b594696d6532143580069a022e39245413 SHA-256: fb9d6b798009bc65d54477967894090da45bfb448a4fb30ee85f15bf816086d9
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 0.9999

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://dafemum.ru/strik?utm_term=how+to+unlock+motorola+xpr+7550 PDF link annotation
    • http://bisapusid.mypressonline.com/25130058907.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/db9e5ef3-e305-4735-bdf4-530a6a2fe334/15533413444.pdfIn PDF document text
    • https://99ca13e2-8bf0-45b2-93fa-bbfb519f101f.filesusr.com/ugd/5392be_5dea9e1c85e841dbb002aab53ebe2daf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/85272677208.pdfIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_32f421dc34e74587a7d4b55c7c3efc8d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/kisi_roj_barish_whatsapp_status.pdfIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_df51566b42e84ad9832b7502c88f84d3.pdf?index=trueIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_fa7fcb054a044cfdac2c826e5566935b.pdf?index=trueIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_0aa0e1a344974421a5657bd6041639fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dabatisew/bakamosavos.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/64226256417.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/how_to_program_intermatic_light_switch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8976d9-bb41-4946-89d2-f43ccfb27b0d/woligenodenola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4568adbb-a4d3-4470-9be7-0175ff7a8f2c/rareriturumobub.pdfIn PDF document text
    • https://75cc4b12-69da-4024-8422-75f9303faa99.filesusr.com/ugd/d6c222_079b7d43257849619083e0be7fd6cd6b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eddf967a-0270-477a-bd78-1734553b1346/78959111075.pdfIn PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_0e8d7b7c36424de8b5d4adceff0f8a0b.pdf?index=trueIn PDF document text
    • http://revudipepofaten.myartsonline.com/craftsman_air_compressor_20_gallon_1.5hp.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_off0000e1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FA 5432 bytes
SHA-256: 23af92b66a51fa133688f6eb877dbffbc0d7902fb56cb6c2f830012434e878da
font_01_sfnt_off0000f47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47A 10736 bytes
SHA-256: 25a0160a271c26790448f68264976b3c545512aac38ebaf301d0584c0e5af198

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