Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb1b54a538e1d76…

MALICIOUS

PDF

106.4 KB Created: 2021-03-25 04:38:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e41c5ad55f0537a0c09ee9f3e35173ab SHA-1: c9ead8f753f3be78d8a9e8983b457d6539f6bca6 SHA-256: fdb1b54a538e1d76628765f8a8b950504b0c0c4eef6e6387e380f85f88e55305
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains references to 'Schwinn le tour parts' and the authoring application 'wkhtmltopdf', suggesting a lure to a specific search query. The embedded URL points to a domain associated with phishing activity, likely intended to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/wix?keyword=schwinn+le+tour+parts PDF link annotation
    • http://raicen.com/beldray_airgility_max_manualo92k6.pdfIn PDF document text
    • http://slimerecipe.org/vermont_castings_intrepid_spare_partstezop.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/gihgjU9/nihilumbra_walkthrough_volcano.pdfIn PDF document text
    • http://jobauthor.online/royal_wedding_pastor_speechs01ai.pdfIn PDF document text
    • http://cosmicgig.com/30761903388xyr3n.pdfIn PDF document text
    • http://flowerport.shop/milowidaburwo8p.pdfIn PDF document text
    • http://dorightschool.com/piliwarae80w6.pdfIn PDF document text
    • http://trysoda.club/nuby_manual_breast_pump_videoq7268.pdfIn PDF document text
    • http://persequenteamsohbet.com/51821622242secnv.pdfIn PDF document text
    • https://cdn.sqhk.co/merisipugito/AKhhiaU/hello_zombie_apk_download_in_jio_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/5GTqgfo/8811460015.pdfIn PDF document text
    • https://zazigiwozaka.weebly.com/uploads/1/3/2/6/132681333/munomamebikog-somavuzegos-finized.pdfIn PDF document text
    • https://vogafixam.weebly.com/uploads/1/3/4/3/134310040/9f2bc583764.pdfIn PDF document text
    • https://cdn.sqhk.co/pajelidul/2GdJxid/cake_games_that_i_can_play.pdfIn PDF document text
    • http://afracheat4.xyz/ruvidatudidexuriptd5j.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/803b284d-e4d1-456c-8d0a-ce9048554de4/simplified_myers_briggs_compatibility_test.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/53817233522.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/fapob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64e80999-b5ce-4d99-9062-b86e73c08b7d/roomba_model_770_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa16161-3933-4413-88a8-b393d6bdc7ab/96052740859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd46333-9dc9-43c0-8568-63defb478c4d/how_to_extend_my_cdl_permit.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/rheem_gas_hot_water_heater_reset_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b157f925-c46a-4c7e-9392-63644a3a89d6/37163981426.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_off00016654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16654 5216 bytes
SHA-256: 1e4e7dba6e13a239e7afbc9c31d4a8b568915a00792d00df1626e6f893cc5df1
font_01_sfnt_off0001781c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1781C 10524 bytes
SHA-256: 0d72f802c54fc2c72bc9e30fe04d8210b808c449faa2266b6df1d68cd837d2d7

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