Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c41881f4468f6e…

MALICIOUS

PDF

197.3 KB Created: 2021-06-20 22:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 97dc2c3684abb1698bfa1e71440fb08d SHA-1: 9680c369c043bda8c94ec42457926ef76a4caa38 SHA-256: e4c41881f4468f6e2f091b1d36764f7d24e70ebf50ab5b4ed2d945cbc0fe43c1
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains a link farm pointing to compromised WordPress upload storage, suggesting it's used to host or redirect to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • 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.
  • 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://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/ggpiivca33vmpvhhql5dbk71d7/sejoleguleferelozaluf.pdf In PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/4237f98b03c6acbf0a03236f26366cd7/88087495627.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b429a38a0e---nujukezeworokokof.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/gd0llb1sam9fa6dfajfmnsqm2e/11992788152.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a036c6bd7e2---nivavataxabokufafisiwewu.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e84e3ca266---28501317818.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/20881251452.pdfIn PDF document text
    • http://meta-min.com/files/40210705674.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608414df8760c---nejezesog.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/gasapowo.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/7du6s5jcv6936p76ape4nrjjkv/sapak.pdfIn PDF document text
    • https://ckmusicdesign.nluserfiles/file/magewuwazerutezapolajibok.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0639e59bc---jubuzovadej.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608157a9ba9b4---vatagibesazuxamujik.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/luvamokimabenag.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/12445146286.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-5/20210505100219248208.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/42472640282.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=agents+princess+season+2PDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00010e68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10E68 151304 bytes
SHA-256: fe5251f2b208ebe77cb5582b1a51b248305ec2300b0a4fc299ab5603270272cc
font_01_sfnt_off0002cd8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CD8B 5188 bytes
SHA-256: 66c4b4592f9d0268ab8fc01d370fef1a2cbf322ef0c1777d52d118defe2c8278
font_02_sfnt_off0002df4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF4C 12332 bytes
SHA-256: 404ffe7fb1a96b76497760bb7022fb8cebda99a06ab41df36a41377735b9a936

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