Malicious PDF — malware analysis report

Static analysis result for SHA-256 11fb0983af363eaa…

MALICIOUS

PDF

68.8 KB Created: 2021-09-15 18:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3404a6eb6004a2b48a7f3fc1c2a4bee9 SHA-1: f8c166b9c66ce8cf3e58751762444165d8269fb9 SHA-256: 11fb0983af363eaa47a7523519bc1077283143d26b03f1ee971bc9984de9625f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and the compromised CMS upload link heuristic indicate a strong likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://allytemp.ru/uplcv?utm_term=door+unturned+id PDF link annotation
    • http://autoscuolapezzano.it/userfiles/files/xadalo.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b52da5816---lugamud.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/tafekigupezivowexa.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/tuzuvutusekag.pdfIn PDF document text
    • https://togeltop.net/contents/files/wodipusuxarite.pdfIn PDF document text
    • https://maciejabramowicz.pl/upload/files/file/52270685761.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/46883788645.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613465adc4fd0---53229360957.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/oo7p8dli8atnri1uvkqakh6ic0/baxobamedovulijudabo.pdfIn PDF document text
    • https://everestart.com/images/stories/file/31482296320.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/18024904238.pdfIn PDF document text
    • https://laundrybyconrads.com/nbloom/fckuploads/file/sibolev.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/dbe5532d7d1e1600f49f1d4e82fdd356/gasovid.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210902021342.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/43149851555.pdfIn PDF document text
    • http://bernendorf.ru/userfiles/file/dagatusuxapawa.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/83946387829.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/13801949736.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea3f5e167d---53139317173.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/fugupufagubotibupojirola.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/jojipogapu.pdfIn PDF document text
    • http://jgweld18.com/UploadFile/file/20210906120924284.pdfIn PDF document text
    • http://ternovykh.ru/content/file/lalozabiko.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210911000508_3c66oo.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_off0000b0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CD 15344 bytes
SHA-256: 575ae4f56a0611575daf6a64ea6970552896b31df70c27c14f3e28f3fbae8198
font_02_sfnt_off0000efff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFF 9964 bytes
SHA-256: 3c3c2edb3489839baa65a827eba26d834603fa58653f19d78fa2303e3e74fb26

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