Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0e097fe9224039…

MALICIOUS

PDF

95.9 KB Created: 2021-08-14 22:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2bd9e8150cbda28e5c88d2a87dd34ad6 SHA-1: 1b7f900d3d8ec272c54730c381030ce90bbba722 SHA-256: 5e0e097fe92240399572f34db17a07d331bd1c3cf917cd050ec5b3c8f48c2da3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a "download button" heuristic, combined with numerous links to PDF files hosted on various domains, suggests a phishing or malware distribution scheme. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure points to a malicious download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

Heuristics 7

  • 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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pc75.net/upfiles/file/1621831668.pdf In PDF document text
    • https://togeltop.net/contents//files/77648285532.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/nukomekobikojabusepemako.pdfIn PDF document text
    • https://dcimx.com/files/4630706570.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/52895381977.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/58543137988.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/remevidolobezufetalozax.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/kezupa.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/742nibfubap8uqdff7vntl3hd6/jaruke.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ac0e3b9fe---85443601518.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/lozuguragar.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979cc3945aa---zudumoliwileruguneferafo.pdfIn PDF document text
    • http://elektromig.pl/userfiles/file/zejelavunisepi.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/k4omdal17ios253a45vbg9laip/80348946908.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/59602957845.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/14424383685.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/28deff9591c95b7f5e9d2995da60e50d/mabeg.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/revutixasotuvolivuzupal.pdfIn PDF document text
    • https://jewfri.kr/files/image/files/83234559174.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/f77080afe9dc4791df9613381f89a074/17870252173.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/sopirivijurumegupotupelox.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/9d59619c64b0b8f3e3a19ed47d7bc90e/35618200996.pdfIn PDF document text
    • http://leakefamilyreunion.com/clients/63964/File/nejiwaxepowofufi.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/pumetelovakinunasopor.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc3c12ec1b---tupidijuginija.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/24220588266.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=bmw+tis+download+2020PDF 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_off00010da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000125bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BC 10556 bytes
SHA-256: 57032ea16b6547443d0448e41f442448fd25f4dff1130d1ba938bc18f8b0c38d
font_02_sfnt_off00013ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDF 18408 bytes
SHA-256: 965f27e163f5c9df7c0f1e53129b1c46f6c582da7ccef59077d4eea14646c3c1

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