Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56dc177810cf062…

MALICIOUS

PDF

53.2 KB Created: 2020-10-28 14:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 57e7cfa00d7ad044c6d0737225ccc2f4 SHA-1: 5c601ecbff2986a039a07a9daa597c36fa9202cc SHA-256: a56dc177810cf062ed2b36722dbfb383687709f787e056cfc96ec1d7c826e16f
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://cctraff.ru/123?keyword=whirlpool+gold+refrigerator+model+gb2fhdxwq02+manual In PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/vukiw.pdfIn PDF document text
    • https://sixodajumam.weebly.com/uploads/1/3/4/3/134311071/lobinet.pdfIn PDF document text
    • https://ziperivowupidu.weebly.com/uploads/1/3/1/3/131381589/ea12a8e9f355cd.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/pewagelipogi.pdfIn PDF document text
    • https://puzemebakojufem.weebly.com/uploads/1/3/4/2/134234574/7033392.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/766af8b0-bd7c-494e-8bb7-8e535043c01f/rechargeable_pool_vacuum_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/spotify_premium_apk_download_cracked_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/11729732850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/wumiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd9c679-8aca-4392-ac40-1e2626ed6c30/bexegoteramofifef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8229/1637/files/jakuvozetufizin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1609/3335/files/xubabipexivinekome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7255/5674/files/absceso_pulmonar_tratamiento.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/comment_avoir_confiance_en_soi_livre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5289/8739/files/metaphor_and_simile_worksheets_grade_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d0f62e3-ed26-4113-bb72-60a695bcbc14/do_planeswalker_have_summoning_sickness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68eea0a5-5a97-4bca-a19b-fd6fbcf6e666/a_goofy_movie_1080p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f3414ac-7e2a-43e2-8541-43777cda8345/subway_map_new_york.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6916bc5-2b64-451c-84ae-fd3e6e916f15/mufiwavafikavoxonari.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_off00008f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F65 5988 bytes
SHA-256: ddb32a339ce5ece2d25256b88e360a7637444802893d33dedf7734b1e56f2f84
font_01_sfnt_off0000a3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B9 10564 bytes
SHA-256: f58cb616ba8f8a7a86c9d789e54cf2cba416cd6bf13f06cdb7066f3a026bc84f

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