Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac8fff70eafc971…

MALICIOUS

PDF

79.1 KB Created: 2021-03-15 03:37:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b2ddb6e7c00a0a52c4f73fdfb643ed23 SHA-1: 0943f0e26cc9c9ba5b9af6094a670146b377ffe7 SHA-256: 0ac8fff70eafc971355761e4c320eada07219938173675332f090bd825b3ef27
156 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 ClamAV and 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 0.9993

Heuristics 5

  • 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.
  • 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://bologen.ru/wix?keyword=osrs+slayer+masters PDF link annotation
    • https://cdn.sqhk.co/pefisemise/oifgjVP/warsaw_garden_inn.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/buguwapemiw.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/fuiijaJ/xilekifoguju.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/s05B6hb/lotidizaziniv.pdfIn PDF document text
    • https://jogosoti.weebly.com/uploads/1/3/1/4/131453036/bd054d8.pdfIn PDF document text
    • https://zozufawagizawag.weebly.com/uploads/1/3/4/4/134454621/6418437.pdfIn PDF document text
    • https://riwaxetonebena.weebly.com/uploads/1/3/4/3/134363930/7969981.pdfIn PDF document text
    • https://cdn.sqhk.co/semiwewedazi/1PPAhie/offline_rpg_adventure_games_for_android_free_download.pdfIn PDF document text
    • https://nobarolibefo.weebly.com/uploads/1/3/1/4/131407117/44235e0578.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/2e5bf654-b0ab-4d2a-ae56-ad52bb4607dd/will_grayson_will_grayson.pdfIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_98c16d97038746e8aefea631ea5759f4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fipijife/burnout_paradise_pc_game_compressed_free.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/fowotisi.pdfIn PDF document text
    • https://938a05da-450f-421e-a59b-0448473a402a.filesusr.com/ugd/cb5dea_901a6fbbcff442589355231e6a18db2d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liwara/stickers_for_instagram_stories.pdfIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_5191a6e64119441c80a725e302e6487d.pdf?index=trueIn PDF document text
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_9580cbf3ac8b4887ab0a063e2331333e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/87361204660.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/episode_guide_the_good_place_season_3.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/ff7_guide_shinra_building.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/88892209975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb0e88a-4f44-4845-8e08-90a19acf11b5/dakapekezinojaxerizaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/68323876581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/647925d5-372c-40a7-85f0-1ca6ed228445/75903837700.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_off0000f75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75E 4960 bytes
SHA-256: 69e1882a7bce84b96884afbf84609d29db7eee7a9d792e9e66ea75867aaae8a1
font_01_sfnt_off0001082c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082C 11464 bytes
SHA-256: 94425d4bb1c15bb6a39169ece9e42e96278ecc7b3b4db1774684c388dd4171e0

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