Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30191909056b5d9…

MALICIOUS

PDF

79.8 KB Created: 2021-09-23 22:36:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ba1eb2d4405dd6dfd0b8fc0c781cec1e SHA-1: 2c17a3076d88c4f999b14b66fa12fdd42770f302 SHA-256: e30191909056b5d950d56df50ddef9eb89e7a3f39c07a41c0b82dee2d2415578
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a PDF link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. The document body is unreadable, but the presence of numerous external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://accidentmatters.com/ckfinder/userfiles/files/jidatidupi.pdf In PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff14531266---foves.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/gasotamatuwipasivulaxepo.pdfIn PDF document text
    • https://iagclaims.endataclaims.com/ModCoreFilesUploaded/file/gepologabi.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/161411b4c02f00---suzodafasevesugovawim.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/29481431217.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///2021090718533_894743048.pdfIn PDF document text
    • http://symbolfoods.com/files/file///88901675897.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/67523743648.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/61408339991.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130a4354ab94---pilixir.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408e17b4553---luxitag.pdfIn PDF document text
    • http://wenxuezj.com/images/File/72633434371.pdfIn PDF document text
    • https://visualmotion.nl/uploads/file/42556060238.pdfIn PDF document text
    • http://ogcdc.org/uploads/ck_upload/files/64913922638.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/e5d8ac4ea6897ec6fb4b11f44eb06aeb/90583740656.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/xowapesedenazora.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/kunufipisogovinafer.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/46350511750.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/rogixejesizepibako.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/86a8f5b3ff4a545aa2676585b27f5975/44980538974.pdfIn PDF document text
    • https://www.ijdsir.com/ckfinder/userfiles/files/53763531550.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/76400393882.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=cc+card+generator+binPDF 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_off0000d408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD408 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1A 17700 bytes
SHA-256: dbff3daa7910fd270a146851cd6b7da3217169029cd85400e9f9b47a69ffea2f
font_02_sfnt_off000119ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EF 10504 bytes
SHA-256: d295f62d3245f547e35145bfa2c033531752e74b8e8493854f3d291da78ba487