Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b48e5d2e8c0958…

MALICIOUS

PDF

52.1 KB Created: 2020-10-18 12:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7337f3aff6204c02733a9a284cc21057 SHA-1: dd68bfd9bb90a19a6586f3c58ed43c6faece311e SHA-256: 65b48e5d2e8c0958745400057ff503acff8f0deccf8136c258319b98cb38f31b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?keyword=kingdom+rush+origins+mod+apk+unlocked In PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/df69f0d995.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/6a3df928b9.pdfIn PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/fizutigeb.pdfIn PDF document text
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/4083579.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/93049f265a0000.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/jolino_fujiba_lokowupijava_vebime.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/1429013.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/3a08eab74fbcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_5f8b774c2e8b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f8bc05715203.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f899a5f20b45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371269/normal_5f8a2727d4f6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f8ab9bd71da2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0649/3350/files/lg_l41c_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9432/6942/files/78890803431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3433/6670/files/dimesidevejitoruserepade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8276/0601/files/go_dj_lyrics_kaytranada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8490/1277/files/baccalaureate_honors_degree_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/4409/5153/files/97882552080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7670/5690/files/zenekiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab97f45-169a-489c-be67-766bdcaf1d97/ek_tera_naam_hai_sacha_mp3_song_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/678087cf-9d6a-41ed-9c28-8b3adc3691f2/jiforefupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3865a13a-1a6f-476c-b0aa-698003accc58/fisezuva.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F10 5520 bytes
SHA-256: 21a5f9dd92311e7f0a0d89cac760878aac56394ae653f01269450421698b1a4b
font_01_sfnt_off0000819f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x819F 12936 bytes
SHA-256: 32c2853dc1e48ed9393e4e559314486bc59ea06618baf6400a5b0894a87bc528
font_02_sfnt_off0000abd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABD8 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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