Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2fd1262492c3ad…

MALICIOUS

PDF

66.6 KB Created: 2021-03-30 01:31:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e3c229649b26b9ef258c46b74555bd66 SHA-1: e7207a0cad41b606dad3a64aa5c1f9976d29619b SHA-256: 8d2fd1262492c3ad71326ce46d36ddfdd76cbf09a67a39f71c2105e6989a2e7f
186 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 0.9998

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wix?keyword=ocean+webquest+task+sheet+answers PDF link annotation
    • https://jadufebifov.weebly.com/uploads/1/3/4/6/134627690/af2d7b2.pdfIn PDF document text
    • http://potenciy.xyz/11306792279m6iai.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/kexanesupukuzesa.pdfIn PDF document text
    • https://miwejezapelo.weebly.com/uploads/1/3/4/3/134342363/xitut.pdfIn PDF document text
    • http://telgrm.site/bumolukenejivujaparukrrsf9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450864/normal_5fcf17b382156.pdfIn PDF document text
    • http://1s.london/codigo_civil_de_puerto_rico_1930wrh98.pdfIn PDF document text
    • https://zojufagilazit.weebly.com/uploads/1/3/0/9/130969654/bewimopodovuvu.pdfIn PDF document text
    • https://bifukumuvu.weebly.com/uploads/1/3/5/3/135347201/binatoxulemi.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/gjeqier/pajikotu.pdfIn PDF document text
    • https://cdn.sqhk.co/lunapolakezo/d95iinH/loopy_replacement_loops.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393209/normal_6041fab307baa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_cd8ff30a0c994bda918ff10f51e8b059.pdf?index=trueIn PDF document text
    • https://2e4b0ed6-c237-476e-b23b-7c95f147629f.filesusr.com/ugd/30e930_4ac0dced083249f98241db5bcbe8b7ed.pdf?index=trueIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_e66c395484ef49658d175356bfbf2247.pdf?index=trueIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_3aeeb2a19ac84680b90b8531c111942e.pdf?index=trueIn PDF document text
    • https://ede36962-9452-4451-b182-fa4236ba9bc6.filesusr.com/ugd/83b1b3_d9a327c672044bb99961b19f58998980.pdf?index=trueIn PDF document text
    • https://cc6d8859-fc08-4100-a073-55b48c5addfc.filesusr.com/ugd/238140_017eb1fc9f8a41b5874308a577b5f53f.pdf?index=trueIn 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_off0000c74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74B 5304 bytes
SHA-256: 4f5336784ffde9ef16b9aafe2b6adc0939f3636e85fba851c96853c516766b42
font_01_sfnt_off0000d963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD963 10500 bytes
SHA-256: 7ecfa3c8e5ade05306fb1869d131a647f6fe325a4ad49ef259bfde98422f10c8

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