Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a6935543334864…

MALICIOUS

PDF

84.8 KB Created: 2020-11-05 02:21:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 408ca856ec6a1d6a39d62fa386960008 SHA-1: d7104f01ab1c4b04055e0640ca90a47b643a9586 SHA-256: 94a69355433348646a55463ff7dfe73d9ffe77579f92c7aeed4c275087623ef1
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?keyword=navy+uniform+manual In PDF document text
    • https://dexetejitifite.weebly.com/uploads/1/3/4/5/134576896/5144297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f8862229db5d.pdfIn PDF document text
    • https://suranetu.weebly.com/uploads/1/3/4/4/134458043/nofukobetaxelin_degamumepa.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://uploads.strikinglycdn.com/files/5fb72f56-9e0b-4deb-b5af-12e63accc613/jabobapiboligod.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/gifesegeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b35f2463-daac-4782-b807-d3c30cf8b329/2020_acl_njcl_national_latin_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d182c6-ef15-4525-a499-c7f02cf26749/jojumazapijutulisopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed48c8c0-6d79-48a9-9d5c-82467492c552/lanzadera_de_malato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3241b934-3d01-4bb4-9ef1-f6eada47c4f7/2925650245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc6d6ee4-c43f-466c-8407-bf7e68fe4217/vujojisexewo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F0 2984 bytes
SHA-256: 6d78b61f419c13287f5d1adedecebbbad9487bd0aade69d0c1820dea6bf4d71f
font_01_sfnt_off000100a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A7 4552 bytes
SHA-256: eb8ac8ee3d32b31240474ba0c500302e11f059c26585afc53ca4e7bcca001e60
font_02_sfnt_off00010ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFB 11724 bytes
SHA-256: 10db1b8188e33173ecd4f78efbec7898c151334a66232aba6010d0ec63780330
font_03_sfnt_off000137d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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