Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0ac1f6c2f89552…

MALICIOUS

PDF

69.9 KB Created: 2021-03-04 05:44:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 66880a8c4e1398aa06f9ce9858f6c3c0 SHA-1: 61939cbba94332026cf9eed8db25210378baa6c1 SHA-256: 7e0ac1f6c2f895526ba61e2b8d813688b4131288fff2ee91d75a67fc96127b59
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is also flagged by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/123?utm_term=citizen+eco-drive+skyhawk+wr200+men%2527s+watch PDF link annotation
    • http://ch-bewertung-2888.xyz/warmane_boomkin_guidebgt5d.pdfIn PDF document text
    • http://vimatineluxux.22web.org/persian_song_video.pdfIn PDF document text
    • http://reduslim-shop.website/gym_biceps_workout_chartv0k3p.pdfIn PDF document text
    • http://dk-inc.xyz/inside_out_movie_summaryqsud2.pdfIn PDF document text
    • http://dvigatel.guru/81322569487adlyx.pdfIn PDF document text
    • http://gugelomem.22web.org/jesenoked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380527/normal_5ff0dea5f1ddf.pdfIn PDF document text
    • http://copyrightsupporteds.com/zabakk79rq.pdfIn PDF document text
    • http://sunepoxuvigos.66ghz.com/telugu_video_songs_wapwon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/makixibawumebol/search_engine_optimization_bangla_book_download.pdfIn PDF document text
    • http://kewetevidelumuz.epizy.com/rune_fighter_5e_wikidot.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/aws_cloudformation_template_lambda.pdfIn PDF document text
    • http://tijejawoporufil.epizy.com/free_template_for_business_cards_blanks.pdfIn PDF document text
    • http://goxetowapibut.rf.gd/3519661195.pdfIn PDF document text
    • http://fabupumow.epizy.com/troy_bilt_model_13at609g766_parts.pdfIn PDF document text
    • http://fefekug.rf.gd/asking_alexandria_stand_up_and_scream.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC866 5668 bytes
SHA-256: 2928a662398956ab0147fab31c154d838781f306d86b1facb2b9d5e860cae755
font_01_sfnt_off0000dbac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAC 9524 bytes
SHA-256: fc290f2e5c66c12d8d43a047bc5fc8ed946acd4518e49cb1c4b778af15aac306
font_02_sfnt_off0000fc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC49 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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