Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad1e2b921ec9f50…

MALICIOUS

PDF

74.8 KB Created: 2021-01-03 04:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f3d85a6543cff19cc8d802425c5b2dc3 SHA-1: c6860f22fa5905e9ee37eb55f80333b60968daab SHA-256: 1ad1e2b921ec9f5009299c1606d361b9ca6ff7006d1d6d969970393a5cfe1f45
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used in SEO poisoning or link farm attacks to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the PDF structure suggest an attempt to redirect users to potentially harmful content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/wb?keyword=business%20management%20ethics%20and%20entrepreneurship%20pdf PDF link annotation
    • https://wusikizojig.weebly.com/uploads/1/3/4/8/134883510/tuxedu.pdfIn PDF document text
    • https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/6450827.pdfIn PDF document text
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/mikafaked.pdfIn PDF document text
    • https://zusikoxapumobib.weebly.com/uploads/1/3/4/7/134766975/tivudawuwimoxaw_joliwuxuviwi_bewagaposapoto.pdfIn PDF document text
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/5b5fc97c62f.pdfIn PDF document text
    • https://wugivata.weebly.com/uploads/1/3/4/8/134872137/3ff9b.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/ea461c72-0bcb-45c6-b6a4-555334cd9746/philosophy_of_ministry_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4237d982-b48f-45e3-86ff-948b1b73dd1c/gugadunegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d88072ac-9c89-42b5-b614-b5ecfefea488/sesotuzibifawubojemox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/208dc95a-2c71-4c3d-89c0-a5acc8419a43/ideas_for_visual_puns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16459ac-04d0-44d1-9a2f-77dc1abbda48/possessive_apostrophe_worksheet_ks1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c623c6b7-3dce-453c-ab8e-06512aaf509a/wesurukarelit.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_off0000e94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94E 5588 bytes
SHA-256: d4742fb68ecf869e4ac2d90d971974633d0cceed7dd452614f7917d759d53ff0
font_01_sfnt_off0000fc25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC25 9944 bytes
SHA-256: 30dfa2abac2b88db3048ff9bfae16b7d904937ccde01d480a2fdac2afab610e1

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