Malicious PDF — malware analysis report

Static analysis result for SHA-256 e800f01327dda817…

MALICIOUS

PDF

84.5 KB Created: 2021-06-18 13:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 0f2d6c6365b0fe746729417b7dbdaa9e SHA-1: d7974d9554b4e5ce904709d7ad80d37bd9839188 SHA-256: e800f01327dda817ab6e2d20cdcf701eb8e213f8b554a17cd7c7f6d7c4588f16
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/ce907k3afptkupc8d0e241b274/penajibegamol.pdf In PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/sovanaxelufiwaxapesowes.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/vpusm85hkv1g8kfs453l99g6f5/bubomufujiz.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/nimapevas.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160705a7c8b430---vomaxuniniwapir.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/5c7fcf63688f8f9e078a82fad1e02cd2/56604943601.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/90639934604.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749f5a2a0b8---kabibigunuvo.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d353036f2---18988427434.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7f5a989c0---bureserigeda.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/32018834119.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607616a482e83---62716821369.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/n807aqlrkrbm6ikk0jho60c777/962334429.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/12823553356.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a914bd842cf---30368526236.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905ce9c0ef8---rozeredibowemabaludila.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/de044305d2b9340ce4bffe3d2e22c0c3/nenidipidododudusazezu.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/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=wifi+hacker+app+no+rootPDF 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FA 5972 bytes
SHA-256: 02ccbcddbf87a251c9c665425249f1165d265577c444ba903bb2e0d057cbe7c9
font_01_sfnt_off0000f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 4968 bytes
SHA-256: 786eb8bffa62d945cd46edb13a645b2ffe8a80e9312b4dc9689ce8dba8efad52
font_02_sfnt_off00010743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10743 10288 bytes
SHA-256: e198d5c2c9471c36dfbb31344a050f4e1a6428728f09e035c106d8104304e622
font_03_sfnt_off00012ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB2 18544 bytes
SHA-256: d8394fd67898d36e673dd53d2a349a717ec4e702fc30f96667fcb4023b2b13a4

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