Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e50219a1ba53008…

MALICIOUS

PDF

91.8 KB Created: 2021-06-25 08:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbbc29f70c22cd10d6d3fd1171a8f73f SHA-1: d6f8f8a7400c0afe581c35f576d7a9e835213f2c SHA-256: 2e50219a1ba530086a90671b391b018896aeb797e37e0c467a75f0cc4646e709
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://arcos-eff.it/userfiles/files/64739444274.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/sn2j78pqnooo1baokpugq35vcv/22265689817.pdf
    • http://kayapaliinsaat.net/file/lixigugojajegiwomituzur.pdf
    • http://ithalattagarantibelgesi.com/resimlerfiles/mobegep.pdf
    • http://thetestmag.com/userfiles/files/55718616243.pdf
    • https://pubs-icfas.org/icfas_new/dev/ckfinder/userfiles/files/94501311783.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/bukumarizufezumizav.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b168c86acfb---86271122090.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b08e3f671e8---62500250876.pdf
    • https://fablab808.com/nbloom/fckuploads/file/nurakanavomob.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160879171401d0---kaluvuxivor.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/eb0ece031c88be986f0d4d45f19cb2ba/73629691241.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/12ad9a96e5e5a1d2d5c7fb14a94a9a9f/zafevonofog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=i+too+had+a+love+story+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b4f.bin
37b4712249f005bb90aae46a3889f920aaceb7ee7d05330d405d708678e79651		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4F 5188 bytes
font_01_sfnt_off00013d08.bin
23134e37d3432575161ebc26f45484f92edc60fb003601aaf0febb8ec7405c41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D08 11132 bytes

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