Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89b16270f12eb21…

MALICIOUS

PDF

77.1 KB Created: 2021-03-30 14:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a0c1052f8c4bf2a26b341c26268bc03d SHA-1: 7e954300b5064d8a70999e271e1e77dbd10ea82c SHA-256: e89b16270f12eb21201f736bdb81b3852ad83a548ce83a5c3bdf912f8d0b135c
66 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 as malicious by an ML classifier and contains numerous embedded URLs. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host many links on disposable domains, likely to manipulate search engine results or redirect users to malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the link farm nature strongly suggest a phishing or redirection attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://jacksth.ru/strik?utm_term=how+much+does+it+cost+to+be+a+real+estate+agent+in+indiana PDF link annotation
    • https://cdn.sqhk.co/rapowipijes/hibjbgg/school_management_web_application_entrar.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/gigjjgc/65223172400.pdfIn PDF document text
    • http://bagawixaj.mywebcommunity.org/wotumalu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388407/normal_5ffc93a08186e.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/icrhhO3/rupegapikarunevovijefa.pdfIn PDF document text
    • http://kugewezebuvigiw.mygamesonline.org/77631559372.pdfIn PDF document text
    • https://cdn.sqhk.co/fozuwasixeja/ZADNL3A/zombie_war_and_shooting_game_download_for_pc.pdfIn PDF document text
    • http://melomone.scienceontheweb.net/what_resistance_band_should_i_start_with.pdfIn PDF document text
    • http://replyua.site/pemazimatefogcfpj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492286/normal_601d504d3139b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_60435a271a0c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421615/normal_600d0675b0472.pdfIn PDF document text
    • http://picsonair.com/xajawudimamujedilatora15u8n.pdfIn PDF document text
    • https://cdn.sqhk.co/piwewupovo/XGcihOy/viking_river_boats_names.pdfIn PDF document text
    • https://cdn.sqhk.co/bajafigotuvi/d9ibiaz/pro_series_drag_racing_money_glitch.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/jeurBkF/zanikorigarugatijovo.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/behringer_neutron_patches.pdfIn PDF document text
    • http://goldotzyv.ru/alto_shaam_1000-up_parts_manual6vvc9.pdfIn PDF document text
    • http://popularchoice.space/my_community_kindergarten_worksheets63rk6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489848/normal_60579aaac59fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/how_to_do_statistical_analysis_of_survey_data.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/bhojpuri_movie_nirahua_hindustani_3_free.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_off0000eeff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFF 5544 bytes
SHA-256: 51d2c86599c90fb95fed299daa65c651aa803bb51d0e163f586231ea312b10cc
font_01_sfnt_off000101b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B9 10884 bytes
SHA-256: e33a3a0f42afeb316a280ac3c14ac522be78849ba44d41a0d48a1c35840ff8f5

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