Malicious PDF — malware analysis report

Static analysis result for SHA-256 929a7277ec9ecbb7…

MALICIOUS

PDF

87.5 KB Created: 2021-07-29 21:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 43373cdb5b146808281c5580de71e5a7 SHA-1: ad7233c0a94e984f6bc6514efb002940314f5fa6 SHA-256: 929a7277ec9ecbb714478cdb445ac42c623f8532c8fecdb4a67089cad16cdde1
196 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The heuristic 'SE_LOLBIN_RUN_COMMAND' also indicates suspicious command-line tokens within the document text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc9f1ed24a---falokatomolok.pdf In PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210727225301189.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/tcmdk2vl0vd8aq8m3hn6v8ubma/65116905765.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/pisorelure.pdfIn PDF document text
    • https://educhina.mn/editor/files/36646796406.pdfIn macro / runtime command snippet
    • http://gagutp.com/sa_upload/userfiles/file/20210522214839.pdfIn macro / runtime command snippet
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/a34703a335fade8c707dee2912fa3abf/67671642068.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/37881581092.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/b0160f9dc58ffb69d98af8de8c2884c5/66209738185.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/36hladc9a91i8f6ck1nd8euag6/46398656412.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/36393189435.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/badivonilivizarowusimew.pdfIn PDF document text
    • https://epiphanych.com/images/file/zofaginigi.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/jixomadi.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/6326a65c3c40195b57b222a4300a5784/92684905830.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/427a5de578b721018234af3dada757a6/gegivotuxese.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/zojofidovuva.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f039d172be---75050471175.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095500834afe---42437247061.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/okhg19fotgt3qdsvb0sce9rvs6/tezugagelakepokekoso.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c10465254cb---vozovotekesubejuwuwiko.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0b9704c19---ginefexu.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/4a2d072aaa551ceaa4ec4f77ef8e148a/15739040642.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/tagogolikomafazagudu.pdfIn PDF document text
    • http://caigeshi.com/uploadfile/file/2021072809025773499.pdfIn PDF document text
    • http://qlinairnv.bIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=leyes+de+radicales+formulasPDF 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_off0000f1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AE 17796 bytes
SHA-256: 7bb8c983aac168aa0196fc01b39e38a138a04b3a0b302dafde92612d6a3800d0
font_01_sfnt_off00011f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001372c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1372C 10608 bytes
SHA-256: 498926327637068bf84b437ccf5a231389b0a9af4c7314728ec3390ddcec8bef

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