Malicious PDF — malware analysis report

Static analysis result for SHA-256 eecf7731c41de7a0…

MALICIOUS

PDF

83.6 KB Created: 2021-09-02 02:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5b249d1f69840733e91c6368615f48b3 SHA-1: 0658066f3d25db50c58eb26195b3a9cc6b257d1f SHA-256: eecf7731c41de7a044cc370aaede3d1140cb1e4bcdf7802e1a7442517348e2e0
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution attempt. The document body is unreadable binary data, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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.
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c183b27cdf---54500902935.pdf In PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/jepubabaniro.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/7f9e2382c7e37935e0f4c0901f55b4de/95069199543.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160829824ec8e9---zubizumuzozuzuguxonuweza.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607507beb130a---fubam.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/e20200ce5f79f8a8447be0e9f3ef3cd3/niwiguremiranevefexu.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/juzajajis.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/2da8d0329fd30b2719d72cac2ce5e756/dewinunozazixati.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/zunejawosasagarer.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210713042313.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ee981eb76---63140651581.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/32862084092.pdfIn PDF document text
    • http://ekotronic.eu/files/file/xatujumewavixavunaruguduv.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cffa9acff5---77262204946.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/pinabunasegi.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/21191444756.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/96039171627.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/ledokeze.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/9ucmukodg46a9n9j163v168ic0/31884746015.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bf84447cd0a---23747609900.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/39528665822.pdfIn PDF document text
    • https://airshow-bg.com/file/16590710058.pdfIn PDF document text
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/87159175629.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/27679116573.pdfIn PDF document text
    • http://jarosi.hu/files/file/81296160748.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/6f7b8bc4e2954b361ab9eabc63a58db0/mutofazomi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=relax+in+englishPDF 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_off0000e3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFB 10216 bytes
SHA-256: c6bb1fc2ffd7494d576e1c78618d6e51a27a60dd699d1e060822e3c56a5b2b51
font_02_sfnt_off000112c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C4 17924 bytes
SHA-256: d0ee0c47c174098911dfbc8f3c45a647edf327cfd1e76006562b7727bd52d9c7

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