Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1582661a8e75217…

MALICIOUS

PDF

74.3 KB Created: 2021-03-24 14:14:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a93592481170abbb24bebd66baa45055 SHA-1: d0faa367dbb9737eb07a5340a14395811d41479e SHA-256: e1582661a8e7521755626d450b9a158eaf492385d11892ccc77c3fa0d9a5bdd7
66 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 of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this behavior. While no scripts were directly extracted, the presence of many external URIs suggests an attempt to download or redirect to malicious content, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/strik?utm_term=i%2527ll+be+there+to+save+the+day+superman+got+nothing PDF link annotation
    • http://futajef.medianewsonline.com/principles_of_communications_systems_modulation_and_noise_7th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/siloneza/7ogPeyb/49483447274.pdfIn PDF document text
    • http://unlockdeals.shop/english_words_and_their_meaningq2w6w.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/61803908100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482847/normal_600c06470dc50.pdfIn PDF document text
    • http://robinmani.site/mcgraw_hill_my_math_kindergarten_volume_23siv5.pdfIn PDF document text
    • http://erkutungotu.com/39033311321pyvrj.pdfIn PDF document text
    • http://manybigs.space/voxuvunifavunimelafarexj672y.pdfIn PDF document text
    • https://cdn.sqhk.co/banifiga/jiadQgh/data_dashboard_google_sheets.pdfIn PDF document text
    • http://cocobuka3.xyz/vijixenebojunevmz3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404297/normal_6002d5c593745.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://fofanab.epizy.com/sepikinajamixapujegusexir.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/animated_background_powerpoint_templates_free.pdfIn PDF document text
    • http://moferamobonar.epizy.com/57364574270.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/19676043708.pdfIn PDF document text
    • http://soxalisaxofaba.epizy.com/39182283909.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/lutron_caseta_bridge_manual.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_off0000d8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CF 5528 bytes
SHA-256: 59183463f6ed37d294adc556a65576425dbb0350c81005939294048e9d46501f
font_01_sfnt_off0000eb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB73 9992 bytes
SHA-256: cac7a0145b8b06d48c0084fce773b6d6346c0c3072083ed395893612efa87554
font_02_sfnt_off00010d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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