Malicious PDF — malware analysis report

Static analysis result for SHA-256 b072dc43866f99af…

MALICIOUS

PDF

81.2 KB Created: 2021-03-16 06:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9a55dd554e116a753f7dbaea52dd2f7b SHA-1: 959bd6a0e76b5af0a526f3f8b860d595a98d9215 SHA-256: b072dc43866f99afe884443021089176b8ae9ea99b50eb2f6313d5535753762e
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/wix?keyword=zero+hyper+stats+guide PDF link annotation
    • http://axecheat6.xyz/norelco_multigroom_3000_vs_7000n6yjv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393631/normal_6017bfa43a24a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489429/normal_6042af4c0b5a5.pdfIn PDF document text
    • http://souve.me/legend_of_the_sword_in_the_stone_lyrics91bb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_604b0fd3bb8df.pdfIn PDF document text
    • https://tapizijivuvol.weebly.com/uploads/1/3/2/6/132696465/a33a0c.pdfIn PDF document text
    • http://bostpolamos.site/lord_of_the_rings_trilogy_extended_editionr43fi.pdfIn PDF document text
    • http://italywow.pro/96750753455lfpzk.pdfIn PDF document text
    • http://hangookoil.ru/australian_dialysis_unit_guide8n9ql.pdfIn PDF document text
    • https://watepiwod.weebly.com/uploads/1/3/2/7/132710700/wanosagavut.pdfIn PDF document text
    • https://vowodilob.weebly.com/uploads/1/3/4/6/134697463/vojusajovuli.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/41a0be68-11da-45ed-bd70-be40dbae6dbf/the_fall_of_the_house_of_usher_movie_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/indian_comedy_movies_free_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/jedaxawijixiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee727df-99be-463a-b4d3-516485746ca8/bukelap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f81f5a46-030f-4756-b108-b5db41837dbe/types_of_natural_classification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03696a89-dc6e-475e-b65e-edfc887f438a/what_does_god_say_about_being_content.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/zizaterudalupen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7835f3c8-2d9d-47fc-a8d9-68bb5c2f1b64/xegajazadalurasop.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_off000100a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A7 5248 bytes
SHA-256: f08cf695f8a59f251dc793c302528fd30a098be9491fe6f897ba432602cdd641
font_01_sfnt_off00011289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11289 10804 bytes
SHA-256: a2a9ba57a6a5102035cb826fb5b47f3521fd011af7342459977a66929cc6ad03

Open this report in the interactive analyzer, or submit your own file for analysis.