Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae80d5fa40c3c0c9…

MALICIOUS

PDF

72.7 KB Created: 2021-07-09 18:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0ef6ff176a3d748c14d8459b5ce0fc33 SHA-1: 20612748b9452a89d1bc1753266fd1c1a7e6c668 SHA-256: ae80d5fa40c3c0c92dc5c4752039fe0731f5f528d4797f101ecec79a492f6017
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of multiple PDF link farm indicators reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://gamjagolla.com/uploads/files/32473998942.pdf In PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/hr75ld4t4sffpfv048bjmkeqfg/rufejoludupiziwure.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/c0bce432d74613f006de9ded33a560ef/12662256940.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/lodemijela.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/jikulonovijego.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///41150011429.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/9799873237.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/lemawid.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f33695a46c---31985949296.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/qm3qdlpv8p0l7uauqpmpvn5knc/91974508344.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/98224253757.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/99047956818.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/va693l1shu7dgjct9urcl5llmn/gababuzifoxovatazodolo.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/vizejegifevokipe.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c977d5dcc1---duvibigumas.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/7bfda66606c37df045c83121bd996409/47928879085.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7005f3d44e---kusujumoworibusunuvabif.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/91254270974.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6678d8303---7440988873.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c59e537c8c9---23402412836.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/4da606a29687417d7cc5df298ba67f37/96152656563.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/29704039340.pdfIn PDF document text
    • https://anfauglir.com/images/file/30653958719.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/s1225vs2790paum4fcnttmk630/28257086587.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=vans+nails+pricesPDF 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_off0000bcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CB 16408 bytes
SHA-256: 490ce68ff56fe9a40d2f400826c1af416c4351ab8143e1bac24ea50ed0ddb076
font_02_sfnt_off0000ff22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF22 10120 bytes
SHA-256: fe1906c363e5425f3befc80af87745122e1b938431c39fdccd1f85347cfb1a5a

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