Malicious PDF — malware analysis report

Static analysis result for SHA-256 69072e9415887589…

MALICIOUS

PDF

96.7 KB Created: 2021-07-23 17:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9d6962fbb196b311e0ad8110fe32b200 SHA-1: 12dc29b9a155862b844b4635b2d8e0d8d208dc8b SHA-256: 69072e941588758956aaddd6155e6b8405710c4a284ee229d7911c97b55f121b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting it functions as a link farm. While no scripts were explicitly extracted, the presence of numerous embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest the document's purpose is to redirect users to potentially malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://seasonsblinds.com/uploads/ckfinder/userfiles/files/vegafozajufip.pdf In PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080e075a42da---3705266295.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/3281988525.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/goteteripilu.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/54259820611.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1944f64085---galaloxifoge.pdfIn PDF document text
    • http://industrialdevices.in/uploads/firorebibobosinuxanidulus.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/tezarumanakegajo.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae12178c21a---supub.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/48333537886.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/xegepom.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/6205582f070637547f7fb0a58bd6a489/lulagavo.pdfIn PDF document text
    • https://anduong-nhatthanh.com/uploads/news_file/85482131713.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/03694fbe0c273b9b294d0e7614b00381/99344847736.pdfIn PDF document text
    • https://lanjutpt1.com/contents//files/gasufazagema.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083b6341e482---torikaregobofak.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/74068251120.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-7-16/20210716221248451430.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846305dfb99---36882684900.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/67o55b9unsal93i0ctj73plb56/demaribizenumatidul.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/mbd7f1qcb3p8tmbvhfav7ilhe2/bapesuzopelapotasiw.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160720c1f79da3---16488342222.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094641db5188---mexopolefekelawolatesizi.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/rusemowasikeja.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/xaxuvoriwifepirexumese.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/42441728274.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=skyrim+creation+kit+dialogue+not+workingPDF 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_off00011283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11283 11012 bytes
SHA-256: ab1aaf9f63f502ec1df16df25110c5a66905564114eae441f61c727fb6083c47
font_01_sfnt_off00012bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFA 17632 bytes
SHA-256: a91d710cd03f787e5112d088f51f9483477136342259a28ea8d72df62ddd8442
font_02_sfnt_off00015a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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