Malicious PDF — malware analysis report

Static analysis result for SHA-256 227f6003e2721bf0…

MALICIOUS

PDF

77.6 KB Created: 2021-09-02 14:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ded3ac8ecb840ebc2c5d5a972ae0ad3c SHA-1: 5e81dc0076ef1b39fc3ab4067bb845ce4664ebce SHA-256: 227f6003e2721bf0bb81f4136a8f66269f14ad2990e4640f4ab8652ae11b7b2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous URLs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple external URIs and link farm heuristics suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://chiron-ventures.com/chiron/home/img/upload/files/210815144636005027wyj5a.pdf In PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9d21033df---38053081857.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b4c203b28aac85926eb28ea43d437b06/43863680980.pdfIn PDF document text
    • http://rld-carbon.ru/file/zupegananewotufopo.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/1318766375.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738e482fca2---dupus.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c02f999051---62461339958.pdfIn PDF document text
    • http://novichiha.ru/pic/file/kijarizowunujiv.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d74d30777c2---bowelezolasagolulitoponis.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/gofubatibidovulodebe.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609407cb38840---99433620342.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/71711044731.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/kalijezukot.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/lesikalowesij.pdfIn PDF document text
    • https://jetaime-shop.com/files/62203133407.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/qan2juj19i1ta46efp4crhuher/vidip.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/fozunowozirufotuzi.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/d158dfa374d90d7c05f59b543392e68c/kofovekosufuwivox.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/82664716288.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-7-21/20210721135728727063.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/a802b7b0389f9fe0269e3f4754681420/xipudokumenorusapedudozik.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/51100792402.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=fundamentals+of+physical+geography+ncert+pdf+downloadPDF 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_off0000c3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0F 11344 bytes
SHA-256: 98cb62211da4756fbabf7dd7823fd62ed2b8980488a6030f1de813ec6bbc83d4
font_02_sfnt_off0000f66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66C 19120 bytes
SHA-256: 598e4bdce1512bbee99a91a32223a468e7f392293433dc8a3b89fe1913ec31d8

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