Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a272e774a0facb5…

MALICIOUS

PDF

81.3 KB Created: 2021-09-16 01:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6f448785b3e3586e77ff78a05de1117b SHA-1: f6f20f8c2f44cd5aad092949b640155e0b1bf84f SHA-256: 2a272e774a0facb5bc3eabd98ead1e71649dae64c4a4c2c03be8d45379621cde
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains or are part of a link farm, suggesting a phishing or redirection scheme. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://szwygs.com/upload/4023296860.pdf In PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613310a07d7fb---kuxefekagofibolexagefil.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/52391292987.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/81626083270.pdfIn PDF document text
    • http://hstairan.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/zododaboboxojubokowoboda.pdfIn PDF document text
    • http://analhospital.net/file/files/gikew.pdfIn PDF document text
    • https://pomtco.com/technical/files/file/84677440533.pdfIn PDF document text
    • http://warehousetraining.ie/images/tonesibubusu.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/nubuxodewebuvabixaja.pdfIn PDF document text
    • https://12shio4.com/contents/files/58027749134.pdfIn PDF document text
    • http://asfalon.com/__files/file/46142871960.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/35113804511.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/33265458798.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/99646628043.pdfIn PDF document text
    • http://vhz.cz/user-files/55840201388.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/49542469524.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/87054320036.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/80638770483.pdfIn PDF document text
    • http://bajkolandia-leszno.pl/userfiles/file/xuvenapudowuneso.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/77088150699.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/kuker.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=xiaomi+mi+6+vs+redmi+note+9+proPDF link annotation
    • https://mediaget.com/userfiles/files/fumizununemejeputikazofu.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_off0000d57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57D 18864 bytes
SHA-256: ec056438903b4103400c9f0d6d39a391362c5972c84d927320cdead9c5afe87d
font_01_sfnt_off0001069d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069D 10916 bytes
SHA-256: b0224a5bfb5e96010e85db660c8a1d831a42aab1d185bc7093faa8cd476b2480
font_02_sfnt_off00011fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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