Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07126fba3849b77…

MALICIOUS

PDF

77.5 KB Created: 2021-05-02 02:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cfa1c56966266e6b42d22346f4e7d3c7 SHA-1: 53bfc5332d99872a59bd75cf798c68525d3f94c1 SHA-256: e07126fba3849b779728195d54c8de16378df2494b0c2857b6e476341c020bac
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://jottigo.ru/strik?utm_term=how+to+change+fahrenheit+to+celsius+on+braun+thermoscan+pro+4000 PDF link annotation
    • https://cdn.sqhk.co/jisaside/eoPhgjc/iron_chests_mod_minecraft_pe.pdfIn PDF document text
    • https://cdn.sqhk.co/pumapajewa/dHjbPvY/69790670982.pdfIn PDF document text
    • http://hardcreditcheck.info/janozubuvannkmt6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464863/normal_60527268b5339.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoletef/hejemBx/management_skills_assessment_center.pdfIn PDF document text
    • http://setofexperience.site/dish_movil_gratisgaosy.pdfIn PDF document text
    • http://sodaapp.club/pumevukatiwsv7pd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402533/normal_600125cc2803d.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/jicgige/kiwevojixixin.pdfIn PDF document text
    • http://frasqen.online/gatejuzevexevo6jb43.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/AjgibE8/download_mod_among_us_di_minecraft.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_6a77dd7deb454a10ab8d268ad1b363b5.pdf?index=trueIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_762a33e31ba04daa86a7981571322563.pdf?index=trueIn PDF document text
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_5570a2eb83ab43819ceac67950bef5ed.pdf?index=trueIn PDF document text
    • https://7b9449e5-51e9-4a7e-81f5-8587c42320f9.filesusr.com/ugd/571bad_e64725bbc4e541c685a6819393702b61.pdf?index=trueIn PDF document text
    • https://c4fca8c4-0f54-45c3-ae88-320069d86c16.filesusr.com/ugd/ac0d21_fa75f7e092314413ad304f30e299da48.pdf?index=trueIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_7e73934e0b3d4073bd1a13664d3da29d.pdf?index=trueIn PDF document text
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_e1f6910337a24c2ab7f15f7fc8d84476.pdf?index=trueIn PDF document text
    • https://6e3eaeb2-b9dd-4462-8b56-96c59beebd9a.filesusr.com/ugd/dcc11b_c05202435d5d44018f3abfbd963e8291.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA14 5852 bytes
SHA-256: 7f6de203bae85e8b82ef28e91cfc5f88125a46fed7d1c7ee0a33887c99f8e14e
font_01_sfnt_off0000fdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF2 13208 bytes
SHA-256: 7514fe3914c0765d2050aa61afb32b93d2fd22f5fe97fa40d3d673b38fde4516

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