Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedd85a81cd61f2d…

MALICIOUS

PDF

94.2 KB Created: 2021-06-26 14:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 630199685ee6f5836db5dd1f66f6aa27 SHA-1: e1b4ca7d094adc6e94d82a0a704dd9b48eff8053 SHA-256: aedd85a81cd61f2d3cf87d2a2ac32011a0b7ba4d858d2859284234f9cfc5ae2f
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links pointing to various websites, many of which appear to be compromised or disposable hosting. Heuristics indicate a link farm strategy, with a high ML score and ClamAV detection confirming malicious intent. The primary goal appears to be directing users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://krisoc.ru/uplcv?utm_term=princess+and+the+frog+little+tiana PDF link annotation
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/lkuh8d9vpsn2e72l8vkmn5pva3/16370788244.pdfIn PDF document text
    • http://miracleschoolministries.com/survey/userfiles/files/5201174472.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/foninez.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/xadewepabamifanuxuru.pdfIn PDF document text
    • https://actor-conseil.com/files/file/didarexijapowigapux.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/0cb544614eebf977ea3a291ca49ba351/zejevekutoremiwuvikitopix.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8385086ca---dofadex.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/49b7ef0903061bc34953e96f9dac6b87/54164861694.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d03d990a15---99101187051.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f61b5201d3---77435385118.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/59918204318.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/0bb08d77bc173dcd69a8fd9b8a209cac/54596501372.pdfIn PDF document text
    • https://shidoremicrosys.com/media/68980616344.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/61171769560.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/e5ae02534c09310db51c27f90c5ebc21/63015260809.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/99bjqhl0e225puvcq5econukp4/pufakufideziluwulexexemo.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/d4c8cd48f4872f0c911f405f5d658a02/18476490048.pdfIn PDF document text
    • http://btfa.tw/upload/files/84950626365.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4290907d6c---6067494473.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/nozolusonejegizeru.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/japs0cre72rv2n0tbctjr0cdep/57443513542.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bee1fa7da0a---tiwibegafebojej.pdfIn PDF document text
    • 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_off00010963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10963 18216 bytes
SHA-256: 28f6fe8364641cf890d627c12de56ca132ee7a4e7a2b146d821ba137cd379154
font_01_sfnt_off0001393f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1393F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15156 10756 bytes
SHA-256: 009f9681c46904958dd09d54a4b5b92f5e0210417bb2d23ef503874efc63ec47

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