Malicious PDF — malware analysis report

Static analysis result for SHA-256 471fc3269bad70fe…

MALICIOUS

PDF

76.7 KB Created: 2021-03-15 20:32:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bf26e4831ed88420ab7587dcc317020c SHA-1: 9af1bf8bb6dcb70f110ff5d0b8306f05a9aa3db1 SHA-256: 471fc3269bad70fe6c3d3d0f7a054fb990798d4eb44364e8d6b5bcfad108481b
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://botokaw.ru/strik?utm_term=where+can+i+donate+clothes+in+lockdown PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476757/normal_5fe54f325b9b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417652/normal_5fe3c420bdc1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405902/normal_60146899986e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426424/normal_5fe7d81a6f9f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495271/normal_6004c108105be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408701/normal_5ff1830a1fbe6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470412/normal_5fce506c027ba.pdfIn PDF document text
    • http://tarekupi.scienceontheweb.net/xidubelelelemebuvixuta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwivazud.onlinewebshop.net/gufonamuvijenifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8b06ed9-2f27-47ed-ab12-f5a0860a0de4/webasto_diesel_heater_rv.pdfIn PDF document text
    • http://mizetum.onlinewebshop.net/50611147405.pdfIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_5cb2829600f24be1a501a665d9fe9275.pdf?index=trueIn PDF document text
    • https://728bf1be-24e3-4891-ba98-fedceca1a503.filesusr.com/ugd/3268c8_438f3ee019de4f1981f4f6063e1f353a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfef18b2-6f67-40f5-b0e5-9974f9833626/crime_rate_chart_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/39771714785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1a795fc-ba06-45b7-84b4-289107e6cce8/40881875313.pdfIn PDF document text
    • http://magegefopo.atwebpages.com/54954200504.pdfIn PDF document text
    • https://6bb2b61b-82bf-473b-8365-63ddb02ddbdd.filesusr.com/ugd/d55797_3022420e753a4beca44e9756dba6785d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf1f865-ea80-4912-91a3-c1f7702d65bd/creative_sb_x-fi_titanium_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/12233381343.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_off0000ef05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF05 5196 bytes
SHA-256: f91761a3bdce1018e2ea399783b3e839a0662ad18af19e6d9bd12e20cf927ca0
font_01_sfnt_off000100c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C5 10756 bytes
SHA-256: f6b6b2101e06b27af5acc166d78bb4ff92416f49a13ce2a7250e8d7fa8349b2e

Open this report in the interactive analyzer, or submit your own file for analysis.