Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf26885826c864b…

MALICIOUS

PDF

94.3 KB Created: 2021-04-16 23:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e6a66747d779a958c42e9284d65cb2eb SHA-1: abf2a0f127004e5acd14e08589ea334974d92139 SHA-256: fbf26885826c864b5c0be95d387e21fe5f7764e5ad5adb1c34df8e1f23cb6eb4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure malicious intent through a large number of links. The presence of embedded URLs suggests an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=the+happiness+project+ebook+free+download PDF link annotation
    • https://vapigoje.weebly.com/uploads/1/3/5/3/135391726/lotavilaxiv.pdfIn PDF document text
    • http://mastericy-chistoty.ru/estudios_de_casos_y_controles_ejemplosyewjj.pdfIn PDF document text
    • http://ogranicbio.fun/wapelafiwolujerokizaul9ai.pdfIn PDF document text
    • https://nalodewemutut.weebly.com/uploads/1/3/1/1/131164475/959cd4d.pdfIn PDF document text
    • http://autocredit.moscow/trouble_knock_it_down_lyricsv5bc2.pdfIn PDF document text
    • http://creditactive.info/suddenly_repulsed_by_husbandzizfe.pdfIn PDF document text
    • http://center-san.ru/49678756115ubn9u.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/gepamawuretoma.pdfIn PDF document text
    • http://byt-upak.ru/sheet_street_double_bed_comforterspt3pk.pdfIn PDF document text
    • http://wimuzawoxi.getenjoyment.net/centralisation_et_dcentralisation.pdfIn PDF document text
    • http://naturfresh.fun/adding_and_subtracting_algebraic_expressions_worksheetshzibh.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/97925732865.pdfIn PDF document text
    • https://bodokevusigow.weebly.com/uploads/1/3/2/7/132740435/9436495.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
    • http://sonarubitexo.atwebpages.com/html_tags_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26495db7-bc2b-4813-8659-d0c3eb5819f3/gekefibusipolasafizeki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/862cdce5-9b25-4704-9d40-053a026f75e8/31521609992.pdfIn PDF document text
    • http://dijuvunote.onlinewebshop.net/sizuwodekeginipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b08be8d-57a6-4e58-9cc6-42c64af194bc/garmin_vivofit_4_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c672c619-5f41-413b-8bbb-20a7eea29c96/how_to_play_family_feud_trivia_box_card_game.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C7 5352 bytes
SHA-256: e526c629131867c2068a391f2ba5fafca9e643b924047c546d05d52788067a10
font_01_sfnt_off000135f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F7 11344 bytes
SHA-256: 861f0602f88c127c2b8db5310821c0be4ea819c2a6c1351ac2980e0971216dae
font_02_sfnt_off00015c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C52 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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