Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75643933946a6f1…

MALICIOUS

PDF

77.7 KB Created: 2021-05-14 16:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c05bb311a862dbde45908f5b88661eb2 SHA-1: 09601496d689eb24c3a316ec9ed0dd56294e8e0a SHA-256: e75643933946a6f1b84b6740dbf4cd62988904befca7406fb6095856f6eb313d
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 0.9993

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 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://botokaw.ru/strik?utm_term=pc+won%2527t+turn+on+but+power+supply+works PDF link annotation
    • https://cdn.sqhk.co/wemopizajazo/ffwjjYJ/29243448052.pdfIn PDF document text
    • http://vexetifiridik.mypressonline.com/angular_api_documentation.pdfIn PDF document text
    • http://uspeh.icu/how_to_draw_really_cute_animals_bookyo77o.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzaxube/hjaI6ji/setixurukezelozepilolilu.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxiniraz/GiijaWH/samsung_s10_ringtone_download_pagalworld.pdfIn PDF document text
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/sapazaluzeba.pdfIn PDF document text
    • http://businesshelpservice.com/dama-dmbok_free_download_espaol6znej.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Cm9jfWu/13324013923.pdfIn PDF document text
    • https://waxujonugo.weebly.com/uploads/1/3/1/8/131871493/26380.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/cjhREjh/ludo_star_cheat_code_2019.pdfIn PDF document text
    • http://metazoaapc.fun/wijar6ho73.pdfIn PDF document text
    • http://teachersaid.fun/catholic_bible_concordance_freeuj2hd.pdfIn PDF document text
    • https://wopatozobaw.weebly.com/uploads/1/3/2/6/132682171/talejijure.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_4d4d1ed8002d4bb5885f605d1d913366.pdf?index=trueIn PDF document text
    • http://jowawaba.atwebpages.com/91584017310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30364274-8fc1-4e49-a0dd-6de4885f81c2/we_were_liars_characters_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f013a7-39a0-4af0-ba2f-34fdae0a02c9/bowflex_ultimate_2_manual.pdfIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_8ef2adee9b7349649f336cd218eaf2e8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/95236f83-bef6-4448-87c9-7c7c2fa4692f/satir_iceberg_model_explained.pdfIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_a760554af7de48c09df1dd42fd5f6fb9.pdf?index=trueIn PDF document text
    • https://acda325f-ee3b-40e4-882f-fabc489a6840.filesusr.com/ugd/23b3d3_2169380390df4906bc8b66e20051da12.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e15d8a2-943c-4dd4-95b5-e03bc7c29e6f/how_much_does_a_phd_in_molecular_biology_make.pdfIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_0c203420db1949d7ab7824695c85160c.pdf?index=trueIn 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_off0000f344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF344 5152 bytes
SHA-256: a997a608dab723fe54fd5f76cb64eb891b4bd41ebe9f01a4a4cb1237e83a0b31
font_01_sfnt_off000104f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F9 10676 bytes
SHA-256: f69bfaf7c4d9a8dfbc898b9417e712978a3ca1710b8b1e2cecff3c45983ed166

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