Malicious PDF — malware analysis report

Static analysis result for SHA-256 447b4ef39a1ebdc9…

MALICIOUS

PDF

75.0 KB Created: 2021-03-20 03:29:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c55c078c89813addce7aaab628d60265 SHA-1: 23311050963ac555bd6aacf348eae619f28aa3fe SHA-256: 447b4ef39a1ebdc975c11c746725afb302a843ed5625634e4637169d828df3a3
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 0.9991

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://golowaki.ru/award?keyword=analogies+pdf+middle+school PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4500878/normal_5fdfdb6ea3bda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475559/normal_5ffe450d6fc7d.pdfIn PDF document text
    • https://badasemo.weebly.com/uploads/1/3/4/4/134482086/zulufi.pdfIn PDF document text
    • https://xuzipitazejaj.weebly.com/uploads/1/3/4/7/134722028/cadb6b2.pdfIn PDF document text
    • https://ligavovifoma.weebly.com/uploads/1/3/4/5/134522072/7710423.pdfIn PDF document text
    • https://gokaxavel.weebly.com/uploads/1/3/5/3/135316782/4528104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_60289d39ed6c7.pdfIn PDF document text
    • http://groshyk.site/mawibejuxerigotifulugudex1i60m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467581/normal_6003382741ddf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489993/normal_5ffc8d920653c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489839/normal_5fdcc13a94a9e.pdfIn PDF document text
    • http://stroy-level.ru/24073739817etkkk.pdfIn PDF document text
    • https://jawutasujo.weebly.com/uploads/1/3/0/9/130969833/a3079d9d67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411937/normal_5fceb6a5487a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474719/normal_60299ca63ba93.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/b16a4d0d-340e-41a8-9469-af27235a598a/corporate_identity__corporate_design_4.0_das_kompendium.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/what_is_sat_medical_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/183abd51-a237-4429-8f26-c4832f5884ee/kepasetajesodizewinixul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf01be4e-c1a6-4889-84e5-27fcf88b9f0a/how_to_record_accrued_income_in_accounting_equation.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/conception_2_choice_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/68725923253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c69ca227-8163-448a-9e6a-40acedd21a8f/95764791640.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/fishing_barents_sea_pc_game.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/84481938135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff84dfbe-7b48-433a-bbfc-d42422c32cd8/narrative_paper_outline_example.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85D 5464 bytes
SHA-256: 989773f00960ca1571273898cf2cc053ecb729ded3c16e84c078fa77f0ac531c
font_01_sfnt_off0000fad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD2 10540 bytes
SHA-256: 15fea02a187a76c30bdc85ee48e6839a311781925581c7e5f8defe8016709b92

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