Malicious PDF — malware analysis report

Static analysis result for SHA-256 a508e5fdda03c4be…

MALICIOUS

PDF

73.2 KB Created: 2021-03-20 06:28:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2dde7302e550190c8eaa41fb5bf75e7e SHA-1: 563c3379b719c4ac549bfff80b977ab7d46ec36c SHA-256: a508e5fdda03c4be9f4f16a00d59fffde7f42a72afad6cfa1ae72c87a53d3731
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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 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://dugedepap.ru/wix?keyword=stove+in+a+can+walmart PDF link annotation
    • https://nojesinas.weebly.com/uploads/1/3/0/9/130969722/30f735b4bdf.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/fiporam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471958/normal_6055301af37a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426425/normal_604cb5329b7d9.pdfIn PDF document text
    • https://pojamemurix.weebly.com/uploads/1/3/1/4/131408024/ae6fe2b6.pdfIn PDF document text
    • https://sepuzudagek.weebly.com/uploads/1/3/5/3/135329554/numawupopasone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465908/normal_604a9d7d26635.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385030/normal_5fef46161babf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_6013223e6e896.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogivuwe.onlinewebshop.net/4465024547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7dce082-8b25-4e3e-aa0b-8a8485e64196/do_i_put_oil_in_my_ninja_air_fryer.pdfIn PDF document text
    • http://vobozezojip.onlinewebshop.net/how_to_set_time_on_casio_g_shock_ga-100b.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/clothing_drop_off_bins_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcbb16f6-4486-4bad-8be2-dcf0205d1eb9/mcgraw_hill_my_math_grade_5_volume_2_teacher_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c25414e-4e43-43b9-be3c-1b868638f550/voxevifitagawig.pdfIn PDF document text
    • http://gixejemazob.myartsonline.com/char_broil_big_easy_chicken_breast_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da18bcc2-0c93-457e-96da-89e0cfcc1919/rexavagajumurufeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb9ae228-0d7a-40cb-8dc7-54dd2322cd24/45048190405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b17eeffd-5048-4cb2-9b9c-3b52b938abf4/xuwimetigedufibetizopaze.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_off0000e1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A2 5020 bytes
SHA-256: 5401e1cdf071437d87da19ba3e56e7f69ca2a3ec9b0dd6cb88f55650ecd24083
font_01_sfnt_off0000f2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B8 10848 bytes
SHA-256: 18c1f02fdf92fb46874c8923b2585cf6fdb9986d9ee1115bd7a74565c570cbf2

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