Malicious PDF — malware analysis report

Static analysis result for SHA-256 938d7fb9dc2b18d1…

MALICIOUS

PDF

82.1 KB Created: 2021-09-06 23:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 33b1d6958029101844b3877149eac384 SHA-1: 07f83f143be7ee3b525a4aea62d28134fda00706 SHA-256: 938d7fb9dc2b18d1285af4fdd70ca0080ed92b5b768efecbe5cc339b18fbb5b7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The file contains numerous links pointing to potentially compromised WordPress sites and other domains, suggesting a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the presence of external URIs and the overall detection profile indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://queure.ru/uplcv?utm_term=scentsy+fall+2019+pdf PDF link annotation
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16073c725aece0---dalogewavudibuvanole.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/75529070302.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b35280577---vevujawipuwataluselaxuko.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/81405017076.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/91734764506.pdfIn PDF document text
    • http://magnachip.cn/userfiles/file/20210521193027.pdfIn PDF document text
    • https://atlantidegattico.it/file/14265752601.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/2d5541a243c3a9444d9b4813daf3e9d4/zisela.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/10220743947.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607889a4830f9---53916250162.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/perikoxejupogarojidowizo.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2f35de85e---tabovipo.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/kebibajaj.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af322902cf1---10721137795.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/vukogelelam.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/22411451629.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/3246754231.pdfIn PDF document text
    • http://yongqingtech.com/d/files/wixetozekerefijiredo.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/darakixijis.pdfIn PDF document text
    • https://senhewood.com/d/files/sevijapef.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20210627_133327.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f9571adaf---43190592228.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/40905826200.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/i4ph65pfdcs1tgddd90lh0p5u0/jebivimik.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_off0000d786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD786 19108 bytes
SHA-256: 8b2d571d1a4d5980378b6bbf48bb34577b75ef4da5bbf2320af8da70abf142d0
font_01_sfnt_off0001094b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094B 10952 bytes
SHA-256: ac35f7fd1ebcbd6f04d2806016e7fbd220c84adaea9427e9d9d489dd09ece1b2
font_02_sfnt_off000122ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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