Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bff63f68e61abe4…

MALICIOUS

PDF

82.7 KB Created: 2021-03-30 23:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fe7f8ce0620db10e9f08c6a58e145138 SHA-1: e7f78eb0871811486c2653607ffff641e0a0fff7 SHA-256: 7bff63f68e61abe45035cd468a39904ce04040df68e1eef023bd09c4be4250d2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with several pointing to disposable domains and potentially malicious content, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the structure suggests an attempt to redirect users to malicious sites, possibly for credential harvesting or malware distribution.

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://jacksth.ru/strik?utm_term=what+happened+to+beatrice+baudelaire PDF link annotation
    • http://badoxik.scienceontheweb.net/how_to_lean_body_mass.pdfIn PDF document text
    • http://vugaganopofom.mypressonline.com/tedofogo.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/rowiko.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/luwevirajojazagob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497650/normal_6017fa8a3d044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472788/normal_602b3e69c730e.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/bikuguzezider.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/wisesitiketifajor.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/5475108014.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/jeveviwosuxopojukezeni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454161/normal_6049d35623bab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443326/normal_5fc9d66f82c6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/526b4773-2c0a-4128-9c27-eb79ba48b011/organic_chemistry_as_a_second_language_5th_edition_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e9d24b9-b9ba-4031-82b9-dad5cb3ecfa4/palitot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2f200d-820b-4ed3-b256-0791aff9ba67/how_to_read_music_notes_fast.pdfIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_7aa2eea9e7d5497bb7cfa84bdc4f4df3.pdf?index=trueIn PDF document text
    • https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_40d082a1e8e843598a715f2a27750c51.pdf?index=trueIn PDF document text
    • http://dijuvunote.onlinewebshop.net/epochenberblick_aufklrung.pdfIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_47df5dffdc234fbd83cae31ba0054c6d.pdf?index=trueIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_d479f7a3c6a143ad8e60ab53d72323aa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d311c606-292e-4885-adad-d8d28d1fef90/taco_bell_creamy_chipotle_sauce_nutrition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2aea683-49a3-4e9c-9eee-22efcf38d90f/kusitamenukijo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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
stream_004_off000124d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x124D8 16888 bytes
SHA-256: 3c2dc1000267042446b05e35270da19de597dc2b1d5e90c34eafbb079cd79cd9
font_00_sfnt_off0000eebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBB 5136 bytes
SHA-256: f980a86ff48240baa4c48ee0668db96498e6e8bb25fa1da0426a178d2ab41266
font_01_sfnt_off00010034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10034 10604 bytes
SHA-256: 887f8e701ef6073c5bd2bec9ce5dec2a8686b0d21ca914eab99c1a0af2a5f576

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