Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d499871459ba6e…

MALICIOUS

PDF

76.2 KB Created: 2021-03-18 02:16:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83fcb7e74f781c94b7cd9ae5d6c30f08 SHA-1: 7fc876c58d50d128b2261f9df734d6b51794b51d SHA-256: b6d499871459ba6ea3e43452c8c27a19decdbc8038cf7476cc90adedc91f37ca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains an embedded URL that masquerades as a 'clicker heroes achievement guide', likely a social engineering tactic to entice users to click. The PDF structure itself is also suspicious, with duplicate object definitions, suggesting obfuscation or malformation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/wix?keyword=clicker+heroes+achievement+guide
    • https://cdn-cms.f-static.net/uploads/4375071/normal_6015857011573.pdf
    • https://mezobemubuzopos.weebly.com/uploads/1/3/3/9/133997151/873811.pdf
    • https://cdn-cms.f-static.net/uploads/4371014/normal_60282690d0057.pdf
    • https://gixebodaloru.weebly.com/uploads/1/3/1/3/131379223/vafezufodulubenuraju.pdf
    • https://cdn-cms.f-static.net/uploads/4426415/normal_5fe99f070c896.pdf
    • https://pudajimerexinag.weebly.com/uploads/1/3/4/8/134896131/04921a118177888.pdf
    • http://vijevejumozugim.sportsontheweb.net/abu_garcia_elite_max_spinning_reel_reviews.pdf
    • https://cdn-cms.f-static.net/uploads/4421788/normal_602a1e279888d.pdf
    • https://xomaribimufad.weebly.com/uploads/1/3/1/1/131163516/87d952b2cc5.pdf
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/nupovebox.pdf
    • https://cdn-cms.f-static.net/uploads/4365560/normal_6022cf7167af1.pdf
    • https://static.s123-cdn-static.com/uploads/4470523/normal_5ff76c71d96ae.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a21e354a-1af1-405d-a64e-472f54432334/3d_face_scan_dental.pdf
    • https://s3.amazonaws.com/bevarolimesale/rewixezosu.pdf
    • https://uploads.strikinglycdn.com/files/1f1940b1-d203-46c3-8c21-32d4bde5bbe8/price_of_generac_whole_house_generator.pdf
    • http://sogivuwe.onlinewebshop.net/zozelawogu.pdf
    • https://s3.amazonaws.com/babetafaperaxov/gaxapogazinatobizaz.pdf
    • https://uploads.strikinglycdn.com/files/dfcb0d40-e81d-48fc-afc8-3bd54ed8e1dd/41779340893.pdf
    • https://uploads.strikinglycdn.com/files/05015810-4922-46f3-acc3-504c38e71bf3/taxeto.pdf
    • http://wavexijazibivat.myartsonline.com/a_dozen_a_day_preparatory_book.pdf
    • https://s3.amazonaws.com/matogapibelifiv/water_sensitive_urban_design_technical_manual.pdf
    • https://uploads.strikinglycdn.com/files/515c76d5-b7b1-4d16-b3ed-7abf3af63828/22188994872.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8f1.bin
4aadbd5d756ee4759aecc45f5aa41a9b97a069f3779ce802b1814b5d7d9573ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F1 5384 bytes
font_01_sfnt_off0000fb19.bin
33c9169f5b9a065ee0f566475bf64f7b8264e2d4ab46b71bdd0c6578625955ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB19 12104 bytes

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