Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98890cea571dc50…

MALICIOUS

PDF

69.6 KB Created: 2021-06-10 02:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 716f95a39df3274c1b64c0f1f16a4b44 SHA-1: 4093c6b0ca95d080bed22ce587b4ca0ae3eac052 SHA-256: e98890cea571dc50d6343dab43fe0f9c0a7419ec0c93f81797b836baabd850d4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('drafthe.ru') that is likely used for phishing or to host a malicious payload. The PDF structure and the presence of external URIs suggest it's designed to redirect users to harmful content.

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://drafthe.ru/pbw?utm_term=coop+%2526+cami+ask+the+world+season+2+episode+16 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373992/normal_606e699750958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_604ec9b9dc578.pdfIn PDF document text
    • https://xuwojuzo.weebly.com/uploads/1/3/4/4/134471705/tolerelo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480170/normal_5fd840ab0577c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454822/normal_6061fd094083b.pdfIn PDF document text
    • https://migijulomav.weebly.com/uploads/1/3/5/3/135394851/tudawowofesobud_janimiviwevor_jelugaw.pdfIn PDF document text
    • https://lasemekesote.weebly.com/uploads/1/3/4/3/134314396/ketitanimiwevu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403131/normal_5fdc451e31300.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/37011e4f-8664-48e7-b3d2-2e250b2efb6e/biwavin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad64eb56-fe1b-4c77-86e1-42d96ac61bd6/ffxiv_aetherial_wheel_recipe.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/download_sii_decrypt_tool.pdfIn PDF document text
    • http://kodalomibika.pbworks.com/w/file/fetch/144826788/vosimuligoxuri.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/f/58577706277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37694522-8fd2-4c0c-addf-a175df5f7929/nanofi.pdfIn PDF document text
    • http://nunaruribeg.pbworks.com/w/file/fetch/144616593/25158265478.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/w/file/fetch/144617565/nasm_essentials_of_corrective_exercise_training_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87d21ac6-88dd-43a1-9d23-7a949e30b3b6/61919565000.pdfIn PDF document text
    • http://lururefisu.pbworks.com/f/sefak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d26a346b-6a22-46c5-a65c-09edd4bd3626/ramayana_story_summary__complete_book_pdf_in_hindi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC939 3080 bytes
SHA-256: 1cbe04544191bb30a7a97009dc1511722b9e066f78f54459ada3b33b96b99d4f
font_01_sfnt_off0000d436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD436 4196 bytes
SHA-256: de8241fd24a7e1f9f5e710b284080243b04020f22b5a57a06cf8e46ec27b4cce
font_02_sfnt_off0000e286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE286 12380 bytes
SHA-256: 17f3f5114e13abe5df006aa8c23e3f475a4250be6a12d00b99dc0f100170278a

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