Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95304f8fc75d19b…

MALICIOUS

PDF

70.5 KB Created: 2021-05-01 11:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 98dd2e483d0e6ed671043f6c7e922ed3 SHA-1: 14ff9e9c988446a9e4c149ea5ccad5d20dff7a6b SHA-256: d95304f8fc75d19bb14658cbc0ae58a7e1dac0d5b4dda92d4105e0c9e934cdc6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain metadata related to its creation, suggesting it was programmatically generated to mask its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://crophysi.ru/strik?utm_term=whitfield+profile+30+pellet+stove+parts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444630/normal_603a19a17b3ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408195/normal_6008022e00a29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408706/normal_6024007551a25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417992/normal_5fd071fd0b7f1.pdfIn PDF document text
    • https://cdn.sqhk.co/rujopupomob/vfghigf/memafupija.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474736/normal_600fab48e06a2.pdfIn PDF document text
    • https://cdn.sqhk.co/dujepiwewi/dgfsXJr/bollywood_songs_2018_mp3_download_mr_jatt.pdfIn PDF document text
    • https://cdn.sqhk.co/lejukujegomi/higihaz/geometry_dash_subzero_pc_download.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/a5fb1852-ca6b-4dc3-9d39-f0b93a5fdef8/13283061296.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/bleacher_report_mlb_yankees.pdfIn PDF document text
    • http://binemuvafin.epizy.com/76401738248.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/zavaxuxipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ef656f-3cff-4486-bc5c-0bcbb8a2014e/41181609606.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/vitavixotuvorupivifaberi.pdfIn PDF document text
    • http://mufasiloxinak.epizy.com/barium_swallow_radiology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69af6613-6aa9-4a01-8044-cc9d0e746b18/18366578603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b21834b-7b08-415a-8b63-350b953e0eea/18397787558.pdfIn PDF document text
    • http://jaromazezudeg.epizy.com/dronstudy_class_10_biology_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f2bc25a-6ceb-4512-b3e5-d1791fb1c942/kamibulogowir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/596102ee-6d10-47e9-8039-aa72f0eaed24/22581310895.pdfIn PDF document text
    • http://kolifidolositaj.rf.gd/83365304833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8c8fef0-17ef-4f94-9a61-f891f38f5374/difizivo.pdfIn PDF document text
    • http://kidoputuf.epizy.com/how_to_do_dbt_at_home.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_off0000d31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31E 5508 bytes
SHA-256: 7f9142495b32917d32d7347d09e8feaf9a6088747de74628ebb075aea2e37544
font_01_sfnt_off0000e5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E8 11228 bytes
SHA-256: 73eee82ed02459acf7c81ebdcb4ac0058e2a1019734c2e33d45c41f67903f3f9

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