Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c377d46765b44e…

MALICIOUS

PDF

77.7 KB Created: 2021-09-17 21:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: da4a7e6f1344357190e36568e3206c58 SHA-1: d533f68ccf6e47935eafa8860350183bfa676b67 SHA-256: 04c377d46765b44e756c9975452e1dfd323ca697caa259cd50afdd005caea790
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are indicative of a spearphishing attachment, designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://philabc.ru/uplcv?utm_term=best+family+tracking+app+for+android+and+iphone PDF link annotation
    • http://b40555.handyfriendship.com/upload/files/siwemulagedofevo.pdfIn PDF document text
    • http://abwva.com/uploads/files/mokujapafijajefudo.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/59368216907.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/malikuvakotunotaxuwekaz.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/pakefenisevomonorisela.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/vozipokuxugilul.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/15676618753.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/22342947917.pdfIn PDF document text
    • https://mobilpetrol.olajpark.hu/files/files/34861666630.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/15193772137.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/makujo.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/9603427239.pdfIn PDF document text
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/jixaxupes.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142e7c92005f---pezutegopu.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/renamukabomepa.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/xivesibubasaretoko.pdfIn PDF document text
    • http://talesma.com/E/file/tajovoliwaputep.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/funurawebeki.pdfIn PDF document text
    • http://peetersinstallatietechniek.nl/upload/files/zejajasilavujulana.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/83435723524.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/23131750008.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/40785611841.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/70893464151.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/93123591187.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F6 11324 bytes
SHA-256: d09d10954605c9411b33adb7bb3b8c2afc7d5d160c09698499f1ff668c29a3f2
font_01_sfnt_off0000e346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE346 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB58 17620 bytes
SHA-256: 36c660a87b7a7fb7a4b5fa55fa363d6cfb9335cb8fb11e8be2ae840ca16741fe

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