Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fb28c0c07a08c8…

MALICIOUS

PDF

86.5 KB Created: 2021-07-30 07:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 715162354724ae0d20fa274ac9c975bc SHA-1: 3362618f4b1d2349977772de9a5c315c98750a5d SHA-256: 48fb28c0c07a08c8ff356e5b0f84b8b09d9b9fd0a4c856b0990e5dfbffc30eb3
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure and numerous external links align with a spearphishing attachment used to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://plswa.com/wp-content/plugins/super-forms/uploads/php/files/505d693f5969c5279c6a3a3126ea3dee/bokupegokexu.pdf In PDF document text
    • http://bjaimama.com/data/upload/2021/05/file/202105100734598890.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6d8de45246---88918403427.pdfIn PDF document text
    • http://nhs-carpediem.com/clients/46367/File/10925384419.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/d790f21c9ba4e03a956ce048e44cd27b/vuzirelibotelideduj.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609015b64d6b7---lomigewifu.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/vawuwugupolapis.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/19929216195.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/jolojepijitutikukis.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/26513742633.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160982b663a4ac---7105987486.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e560f35fb1---nopifatixujibisege.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/dexodusomogovisitokiduser.pdfIn PDF document text
    • https://coluer.ir/documents/file/17344839567.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/51036571951.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/81729947382.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb86e0e309---dewejazevizuxireraketu.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2e006217e---82018481744.pdfIn PDF document text
    • http://www.siposferenc.hu/html/8833754401.pdfIn PDF document text
    • https://artbynela.com/uploads/file/neludixujadiwipojofumara.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/42842824353.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/96299336716.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d77e7740a---38929853175.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/68855384775.pdfIn PDF document text
    • http://popmetre.com/news/files/rafokitipozenak.pdfIn PDF document text
    • http://vasamo.org/pds/userfiles/files/sodewadamiberago.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=vocabulary+workshop+level+b+unit+11+vocabulary+in+context+answersPDF 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_off0000f26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 11192 bytes
SHA-256: b85910f2d5c43f6bb14704fc9d57f1806aa6a3cddfde4e4a22e8e9942b268ed3
font_01_sfnt_off00010c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C88 15048 bytes
SHA-256: 1a1b7848d3c942dc858fa5a5bf395c1afbb4fa89618c0ffa55271d1649e8d713
font_02_sfnt_off000132ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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