Malicious PDF — malware analysis report

Static analysis result for SHA-256 64075525663c20cf…

MALICIOUS

PDF

46.9 KB Created: 2020-10-28 06:53:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 35f0a68f5e15ff6f5f20acdec5a07cc0 SHA-1: 2bca29a9fd881b0b34639d58b77e4b713d5c954c SHA-256: 64075525663c20cfad2e362d96fb615cab9150b958c35fdef48c2c92acbaf85a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious domains and are likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains a URL that mirrors the suspicious redirector link found in the heuristics. The presence of numerous PDF links and a critical redirector link firing strongly suggests a malicious intent to drive traffic to potentially harmful sites.

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://gettraff.ru/strik?keyword=can%2527t+stop+won%2527t+stop+powder+foundation In PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/rizekerevinidul.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/258552.pdfIn PDF document text
    • https://vofixerexelisat.weebly.com/uploads/1/3/4/3/134311693/wuluwirisegexapuzeja.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/bae6892556.pdfIn PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/09a65df7f3e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/ielts_writing_task_2_academic_band_9.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/64686134208.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/rifesaxafivuranipe.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/world_geography_book_in_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/danafanojag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daf92b3e-2b10-4abd-901b-8f40cec3016c/84325682613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/501e218e-c95d-4afc-bfb6-c43d105e5155/calameo_tamil_novels_mallika_manivannan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80154dc4-6382-4612-b16d-29db8bfdd428/81447076399.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/52573826020.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/arithmetic_ability_questions_and_answers_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/26190079000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2500/4208/files/play_store_para_android_tv_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8744/4133/files/vekixonewevujukewola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8403/6761/files/72993457279.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_off0000756b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756B 5032 bytes
SHA-256: 3b39f121ff9df044aa860219026502e15bde5d425d4de30b40544b5ba3d503b3
font_01_sfnt_off000086b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B2 11824 bytes
SHA-256: b4268849bfd44f741236ac8dd7ed207ac3bb556315b0a46ee3bf49b892dd6908

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