Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f79393525a4fe58…

MALICIOUS

PDF

88.8 KB Created: 2021-03-19 11:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d7d9620998036de6080543005d19de5c SHA-1: 0165ea753b1a749c1855575f931839bcc184871d SHA-256: 9f79393525a4fe58c8eecdb4bf61c49388a8bbb66545f508204fde3f4f9ffba5
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=taking+sides+clashing+views+on+bioethical+issues+pdf PDF link annotation
    • https://s3.amazonaws.com/poresi/wareveritisokiku.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/jdJDPjf/92323091058.pdfIn PDF document text
    • https://cdn.sqhk.co/kixepijap/Lhiifif/sefirabojonopagorodedag.pdfIn PDF document text
    • http://pinerapidsrr.com/53873331999qkjk0.pdfIn PDF document text
    • https://cdn.sqhk.co/divoxisig/YJAingh/pecan_audio_edera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_6046513948352.pdfIn PDF document text
    • http://bitsracing.net/the_divergent_series_allegiant_free_online_movie5k081.pdfIn PDF document text
    • http://goldstein.capital/xedigazusarepebidazip9lybo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461201/normal_60319c2d678d3.pdfIn PDF document text
    • http://impergamon.com/boxexoduvujunhy3wm.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/cadmium_safety_data_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/kilatelazobe/GghXnfk/45766865778.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/gfjejbx/mutant_creatures_addon_mcpe_1._16.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/oracion_del_espiritu_santo_catolicas.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/sodepadorajelejewaxazu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408989/normal_60247ce29a777.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/amarula_cocktail_recipes.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://uploads.strikinglycdn.com/files/7a8ffb7d-1dd9-45ac-88ae-d160f8d3fb3c/insinkerator_evolution_compact_vs_select_plus.pdfIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_e64198ed436c4c04ae4ca4dc3cbeab50.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/be224300-9ba3-4fd8-8870-c9c1f944bba8/31302575759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7dd99f4-abf9-41da-aaef-782cb7117eeb/lorex_eco_stratus_app_not_in_play_store.pdfIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_a219d8e0514940ebaee9c7abfae8b6d2.pdf?index=trueIn 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_off00010f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4A 5508 bytes
SHA-256: a9f5686442d799ad64f1f9a2a8b9d652637d52e048deb5d3db4fa8597bc2b02c
font_01_sfnt_off00012215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12215 10868 bytes
SHA-256: c94103a296cc8576db74ab06a0e44120b4858311ef87199dc74d707963d4d011
font_02_sfnt_off0001470e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1470E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361