Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cd2b865013b2e39…

MALICIOUS

PDF

67.9 KB Created: 2020-12-14 11:05:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 26f60beafcd6069c8252776ad34ab6c6 SHA-1: ed83869bc42ae17d0994700e1815c317f94fc073 SHA-256: 0cd2b865013b2e39adfddafe165460c4eca0863e408280304305bb3e72a22602
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, with critical heuristics identifying them as belonging to a malicious redirector and a link farm. The ClamAV detection and ML classifier further support its malicious nature. The embedded URLs, such as 'https://cctraff.ru/123?utm_term=rectangular+to+polar+calculator+excel', are indicative of phishing or malware distribution attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://cctraff.ru/123?utm_term=rectangular+to+polar+calculator+excel In PDF document text
    • https://malotote.weebly.com/uploads/1/3/4/8/134872882/dujimenesozavew_fixizefameg_vepujadipa_rajefokekofet.pdfIn PDF document text
    • https://vikaworapelesob.weebly.com/uploads/1/3/4/7/134702945/norapotitu.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/b38b9287-c85f-4566-832b-3d24893c650a/layers_of_the_sun_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10d80e9fc3622d522f76c/t/5fcd2661662d5e24e0aab3a7/1607280225357/10285246709.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1ceb7bdb33045eec8b031/t/5fc3037df3de5e49b5c792e7/1606615953373/xilisufigelojeva.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdefbf56a976706ec3f3b3/t/5fd5f5b8b1c3f31c7a764c8c/1607857593563/either_or_and_neither_nor_worksheets.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29af4e9fc3622d52d06da/t/5fcacad374c1090e462adad9/1607125715870/9333918261.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6f6e56339345018512de0/t/5fd617b4491a58544a08065a/1607866293138/sales_and_marketing_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05118a0d-d1e7-4baa-9a5b-2fabcc8f8f7c/shaadi_me_zaroor_aana_full_movie_onl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/709482c5-cca3-47bf-b8e4-4a2f43c24573/driver_san_francisco_2_araba_yamas.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_off0000ce50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE50 4996 bytes
SHA-256: ad0f514164e4610c4276caf7aaca156dfdb9157c23dab07697c880a071bdb25e
font_01_sfnt_off0000df6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6F 10424 bytes
SHA-256: 8e93ef1b3afec3b25016ccb84e9e4dbc374042975a9eddbf4074a6bd4cff8174

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