Malicious PDF — malware analysis report

Static analysis result for SHA-256 54153d4b35a0907f…

MALICIOUS

PDF

82.4 KB Created: 2021-02-14 14:29:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 03b5c412296dc3494b21f7c4a633835c SHA-1: 467b4b2476dee5689907af7ae2662e17354ff755 SHA-256: 54153d4b35a0907f8985e6886ca18690a6b6c5b8f6d4f393388579526103fdb0
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to external websites, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=skam+italia+season+3+episode+2+sub+espa%25C3%25B1ol PDF link annotation
    • http://optalpha.com/270268565572ebv8.pdfIn PDF document text
    • http://cleanup-sale.site/wijilekotopozuvumleoxl.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/rod_stewart_discography_torrentszwu1z.pdfIn PDF document text
    • http://nesobaka9.xyz/bobizorojuvujepev0nv.pdfIn PDF document text
    • http://national-verifyteam.com/analysis_of_survival_data_cox_oakesx57h0.pdfIn PDF document text
    • http://the-job.ru/audiosurf_music_downloadf3l0m.pdfIn PDF document text
    • http://c-advance.space/printable_word_search_puzzles_for_4w4rf7.pdfIn PDF document text
    • http://damvglaz0.xyz/physiotherapy_exercises_for_upper_back_painhfg8t.pdfIn PDF document text
    • http://mybiol.site/dozulaf0v283.pdfIn PDF document text
    • http://alexandreablog.com/arbeitsvertrag_ausfllbar_minijobbvs2o.pdfIn PDF document text
    • http://shop-profildoors.ru/jukisoboxilofasawivugap733xl.pdfIn PDF document text
    • http://podcard2020.site/72524976234i3tr0.pdfIn PDF document text
    • http://pestore.pro/tipomidogusokotagufudbeq2.pdfIn PDF document text
    • http://easy-money-cash.space/libubazulipavubemobawintp0q3.pdfIn PDF document text
    • http://khareedforosh.com/blue_planet_live_lesson_activity_sheetsb3q76.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/xomudufe/liliwaxuleki.pdfIn PDF document text
    • http://kezaforow.epizy.com/rovulekuviweroxojozisome.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/spinal_cord_arteriovenous_malformation_mri.pdfIn PDF document text
    • http://ronapidilejok.rf.gd/womonojor.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/wimbledon_movie_parents_guide.pdfIn PDF document text
    • http://wulisuka.epizy.com/viber_desktop_old_version.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/bluster_informal_crossword_clue_3_3.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_off0000f29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 5708 bytes
SHA-256: 6b4b03421af62469cfe2df9cda9b0fe2669a0c5778634ff6c848d882663685b6
font_01_sfnt_off0001059f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059F 11672 bytes
SHA-256: 031ac7d1f50a03369baae6a43125fad78e6df255f4231097b66b0bc0e194d8ee
font_02_sfnt_off00012bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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