Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb75d917436a554…

MALICIOUS

PDF

88.1 KB Created: 2020-12-15 23:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2bb3d7a844d3b3443acb8ed91212e05f SHA-1: 977e2433c64b1dc508f56c531d74338bec66dbae SHA-256: bbb75d917436a554dcd8399d09f35be01937d901bb08775db47e2dd5c54f8daf
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 0.9997

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://traffnew.ru/123?utm_term=4th+and+goal+2013+unblocked PDF link annotation
    • https://valuluxunu.weebly.com/uploads/1/3/2/7/132710491/pijusi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415929/normal_5fc5fbe6727c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421468/normal_5fc8eb0b88b59.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/tojazudibumogab/dojepiminizulibimawew.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/zolapofevimekuxutaxop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/459b9a58-7d89-467a-884d-fb2b710dad1e/28787686487.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0de27085bf90c0efce9ba/t/5fd0b6f6a4b4ef2db6ac4d54/1607513855148/82625106391.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/79608946184.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/spreadsheet_app_for_iphone.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6769f1452f90b7f0b45ff/t/5fce79a3e1d25c33964df199/1607367076145/green_bay_packers_chicago_bears_game_televised.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c464bb8-660a-46d1-8d8c-b86dc8db173f/wedding_bells_magic_spells.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/fanuc_arcmate_100ic_maintenance_manual.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_off00010fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA6 5448 bytes
SHA-256: 2ba65cd836872649246adc9abb4c2efb807ed6cb54a81bc96873e3d8e27668d2
font_01_sfnt_off00012229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12229 10336 bytes
SHA-256: f3e683b7d688d9e96d187e6c0c22b11c854b3d72e935fb81d73ed2fc87aaad52
font_02_sfnt_off00014550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14550 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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