Malicious PDF — malware analysis report

Static analysis result for SHA-256 439defdfc44a1355…

MALICIOUS

PDF

72.6 KB Created: 2021-09-06 04:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9bf68956ffaa470f3229eca049a52fe7 SHA-1: e6ec6fdef5b9784dd16df7c9d1f52c7b85cbccde SHA-256: 439defdfc44a135540d4aef895a2905e6337c5911284f10b3756a1f5a4747078
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the PDF structure and heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://camping-du-lac-dijon.com/fichiers/disabutuzajivaxogorobaret.pdf In PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/o4e91inu6cmvu971ipaa8n2vk3/zonusafobojegisutiwawuri.pdfIn PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/jimatixabejuxekenevan.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/g9e2d8p8gih57k3ro4qkdlk876/gujujudan.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/29210172947.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/xiruwoxororejogige.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610cb1e1798a2---wasedamurisu.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/rapaluja.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/guoqthhmnf24gmuq4sdnjfph25/xevewipotex.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608511246ad43---favedinobokemupopela.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/sogizemipexe.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/jewixunekeguxodik.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/pusugewubejuripigizaza.pdfIn PDF document text
    • http://elyriacatholic1970.com/clients/7/79/79c6984f8945646ae1b55d50a6b4dbab/File/69870813173.pdfIn PDF document text
    • http://qianxi.cn/filespath/files/20210830121211.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/10104413855.pdfIn PDF document text
    • http://memphiscentral1969.com/clients/865565/File/sapifitagurujewerulu.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/3ba2a2524c5eab2db812c7531b2ccc44/bonowogutasirole.pdfIn PDF document text
    • http://stringpoets.com/userfiles/file/3811597627.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b043cc3448---tisupiwopaxomexuridis.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7dd58eb594---46838084370.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/zuzixazawesapowin.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077576d6b9c4---92816234009.pdfIn PDF document text
    • http://unsersohn.ch/images/file/67230583969.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=overcome+procrastination+pdfPDF 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_off0000bb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD387 10824 bytes
SHA-256: 3ea1e478433b7ab279d3826f07a89254801c638944cd01941fd45fc1f18544d2
font_02_sfnt_off0000ec87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC87 15824 bytes
SHA-256: d1042f0059c6453c22b9b7f4e1daae3963390d2d34927f8bfddaa860bf244cde

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