Malicious PDF — malware analysis report

Static analysis result for SHA-256 19574a4d56a5644d…

MALICIOUS

PDF

84.5 KB Created: 2021-03-21 04:10:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cb11058b09d07a6b6a983f658f2cdb7a SHA-1: 0f48d30a039b574b22064ada2f5457209878419b SHA-256: 19574a4d56a5644d8ed71bdef5afb0182268c4aed1ca49e011003c88d50cb60e
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://gimoguvi.ru/wix?keyword=spyder+victor+2 PDF link annotation
    • http://katalog-siberian-force.online/manage_web_services_api_versioning0i4hg.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/41813113427.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/28064729010.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/pemovuludupinipuj.pdfIn PDF document text
    • http://getporte.xyz/saeco_espresso_machine_canadian_tire5xuaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448343/normal_5fceeffc75fd9.pdfIn PDF document text
    • http://vanlit.ru/mod_san_andreas_installer0zdtb.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/29532724009.pdfIn PDF document text
    • http://datingsexchat.site/ley_de_ohm_teoracld30.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/toro_push_mower_dealers_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410717/normal_6056a89929378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483833/normal_6041e8412af10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pekamidakoj.atwebpages.com/atlas_concorde_marvel_pro.pdfIn PDF document text
    • http://revodez.myartsonline.com/neuroendocrine_system_in_insects.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/wasteland_2_weapon_skills_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/impossible_quiz_1_number_39_answer.pdfIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/zupigifodi.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/kedifanopobi.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_off0000d7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B1 18008 bytes
SHA-256: c206a756685c098dbffc7576713f94c996b2c35d8648f5068df724010cf37dda
font_01_sfnt_off000110ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110ED 5044 bytes
SHA-256: 5996102fb60bd7ad9b70abe0f0585e53ac99ff0a38830c50ebdd61b661bb8174
font_02_sfnt_off0001223d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223D 10276 bytes
SHA-256: 15d20f407b8561d2737ca5ffca76a8306953566f3c4ffaeddd8b72fd5a394ea8

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