Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef90c65a86547135…

MALICIOUS

PDF

77.4 KB Created: 2021-03-02 14:13:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 884f6b30c51e265df966048d340f67d3 SHA-1: 00efc7d0858ee5387b7bd4a22fc3a243e3d6bc14 SHA-256: ef90c65a86547135fc92c0d00b4dda7f7fbf8b94ebace0692c4c37c8722c33b8
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, with one specifically appearing as a search result for a technical query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple disposable domains and link farms suggests an attempt to obscure the ultimate malicious destination.

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://ponafet.ru/award?keyword=how+to+work+out+volume+of+a+cylinder+in+ml PDF link annotation
    • http://sunufosabupes.scienceontheweb.net/navy_writing_desk_with_drawers.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/navy_advancement_cycle_247_results.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447250/normal_600df04f163ee.pdfIn PDF document text
    • http://punejew.mygamesonline.org/78189086797.pdfIn PDF document text
    • https://terigemi.weebly.com/uploads/1/3/1/8/131856376/11eeccafeb4d5.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/how_to_use_pimple_patch_cosrx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467945/normal_6009b2b858c92.pdfIn PDF document text
    • https://matigolexa.weebly.com/uploads/1/3/2/6/132682665/8b68a9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wosemas.rf.gd/cultural_psychology_heine_3rd_edition.pdfIn PDF document text
    • http://gagimuludodu.epizy.com/18987627442.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/43395315605.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/12997035293.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/lajimu.pdfIn PDF document text
    • http://nuladefamevib.epizy.com/how_to_read_biochemistry_report.pdfIn PDF document text
    • http://vogafaxusa.epizy.com/trademark_cease_and_desist_letter.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_off0000f159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF159 5268 bytes
SHA-256: 9019eed78b4d7581c8c76a14a678855a20155b50903bdd3fc9beaf2a2ac60b41
font_01_sfnt_off0001034b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034B 10900 bytes
SHA-256: 79fe3137b4ac162d403b386d676e61391e6967b1ff64261b694a3d92556ad086

Open this report in the interactive analyzer, or submit your own file for analysis.