Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61b507beb4f2cbf…

MALICIOUS

PDF

94.0 KB Created: 2021-09-10 03:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bc8d0b5f6dc6640bc5bc3cda4d5d5df8 SHA-1: 5eb19b8cb9a8e9c1faedabc79253f05b878875de SHA-256: a61b507beb4f2cbf9631e3d0b9969f4cf8469480614ca47006ca3a477a3b4cbb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to other PDF files hosted on a variety of domains, many of which appear to be disposable or of low reputation. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate structure designed to host many links on disposable domains. ClamAV and ML classifiers also flagged this PDF as malicious, suggesting it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 http://pelletier-tp.fr/ckfinder/userfiles/files/78398671047.pdf In PDF document text
    • http://lrm.mcdonalds.ua/ckfinder/userfiles/files/48731130462.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/84480050618.pdfIn PDF document text
    • http://www.heksan.com.pl/file/povirowuxomufup.pdfIn PDF document text
    • http://centronegozi.com/public/joganafosad.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/54563934882.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210904_8FD9383F3F5A8AA3.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/5440880300.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/46524450244.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/97802009676.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/xofibufinexujeripivamapux.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/f2prj9nlnoap0mkh9e2o1vn0e5/vizegenuwa.pdfIn PDF document text
    • http://alvitraders.com/files/15168384711.pdfIn PDF document text
    • https://rimi.sk/userfiles/file/wogafefiferomezikosagipe.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/figixavapewaz.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/vemavuridalome.pdfIn PDF document text
    • https://mbbs.hr/files/sazolefofiwodipode.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1612edc9cbfe94---legajemabezumipofexup.pdfIn PDF document text
    • http://novafish.it/userfiles/files/wamozigubisonili.pdfIn PDF document text
    • https://manhalhealing.com/userfiles/file/40782792873.pdfIn PDF document text
    • http://awards.nl/img/cms/file/moxuxerevelilesazivof.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4877790a1---sodedako.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/85210053202.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=thermal+v12+apkPDF link annotation
    • 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_off0001092a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092A 19208 bytes
SHA-256: 26925c455e4ce38bed554cac79ca05e63f6702bf0749e9dbb969599aed0bc6a3
font_01_sfnt_off00013b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15377 10228 bytes
SHA-256: cd1c2b24f628413494061e655bfab192e9f2244acd2a50a882db4cd0ae813303

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