Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e4705add7f201f…

MALICIOUS

PDF

72.4 KB Created: 2021-03-13 18:25:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 740c051ec7ca01e6b1e79103d1d32e48 SHA-1: d4ce6f5ead8503495c4d2147e343f911328b9049 SHA-256: e8e4705add7f201f5caf6c74805c34b9927c57483c9e77e06e1a9400366d0159
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting it is part of a link farm designed to manipulate search engine results or redirect users to malicious content. The document body, though heavily obfuscated, contains text related to 'Limitations of vsepr theory pdf' and the wkhtmltopdf application, reinforcing the SEO-lure aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://golowaki.ru/award?keyword=limitations+of+vsepr+theory+pdf PDF link annotation
    • https://guzagotoxi.weebly.com/uploads/1/3/5/3/135313280/2e3ccdbf9eb2f.pdfIn PDF document text
    • https://masodorenos.weebly.com/uploads/1/3/0/9/130969057/ca5705ec49.pdfIn PDF document text
    • https://rulovuwupe.weebly.com/uploads/1/3/5/3/135386045/89befab.pdfIn PDF document text
    • https://peruvapi.weebly.com/uploads/1/3/0/8/130813059/5583600.pdfIn PDF document text
    • http://profaudit32.ru/9657416965ydt97.pdfIn PDF document text
    • https://lirejodeju.weebly.com/uploads/1/3/4/6/134628820/565bc2348.pdfIn PDF document text
    • https://tudaluvakagovax.weebly.com/uploads/1/3/4/6/134614365/puliguboruledan_tupaxujadezitu.pdfIn PDF document text
    • http://mebets.xyz/733395356647x5or.pdfIn PDF document text
    • https://dexatasudawuge.weebly.com/uploads/1/3/4/4/134477966/9432599.pdfIn PDF document text
    • https://fobulosarurek.weebly.com/uploads/1/3/3/9/133997379/towozamenu.pdfIn PDF document text
    • https://satizivuzaked.weebly.com/uploads/1/3/4/3/134383512/fuxuzajag.pdfIn PDF document text
    • https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/a519ea2ed.pdfIn PDF document text
    • http://www19216801.site/final_fantasy_7_walkthrough_dons_mansiondw3ya.pdfIn PDF document text
    • https://levapexufusetij.weebly.com/uploads/1/3/4/9/134904519/6193117.pdfIn PDF document text
    • https://nipukidifa.weebly.com/uploads/1/3/0/8/130873732/1962317.pdfIn PDF document text
    • http://profaudit32.ru/62690336044kqfej.pdfIn PDF document text
    • https://komiwafaka.weebly.com/uploads/1/3/2/7/132712661/jimelamikem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/patilawasu/sociological_concepts_and_theories.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/essential_components_of_an_effective_mission_statement.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/harry_potter_studio_tour_souvenir_guidebook_review.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/build_my_life_housefires_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/folavogigadeli.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_off0000dded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDED 5352 bytes
SHA-256: 3da0af3e8f98f8673b50c48ab59e8bb9589b80e81ee79138c8c23c4ce0ea69f4
font_01_sfnt_off0000f009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF009 10496 bytes
SHA-256: 1df5e71ccf04157099cae5f411ac4fe0af155565dd1a6d36695a07c38f3ce698

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