Malicious PDF — malware analysis report

Static analysis result for SHA-256 78aee96b37ded0b0…

MALICIOUS

PDF

85.8 KB Created: 2021-07-06 05:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a4323714ca57f648273fc67132a4d2fe SHA-1: b1e53f9710a10e6f5af15ecd81a5a0122c3cccad SHA-256: 78aee96b37ded0b0dbb54cae179f0c5705585b9c4d9ccd9868a854d8c42f3d09
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. The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm, suggesting a phishing or scam attempt. The presence of these links and the nature of the hosting platforms strongly indicate a malicious redirection scheme.

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://mesahighclassof63.com/clients/79820/File/zoxexabim.pdf In PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/cf9682ac001b892a2c7be5ec1f385d4d/63250214149.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821d984f89f---pavagavuwuzexudoporuxozom.pdfIn PDF document text
    • https://gangnampools.com/contents//files/75818577210.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/79690515689.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7f4fee07b---lafaje.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/49019959131.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/9df4a7ff6c8e8eb52e64f348779c681b/35547455645.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/75688166064.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/luwedukuxivufolegomovexo.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/b87946105199e630a871dc429337956c/958857590.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5435a4d87b---xujuf.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/v9ptfhkifsdonau0o739rqr8im/98963402877.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/maviparuboris.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926e188e2df---kujofojosojoxorawa.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/41c30ef0d4a8e14fe5bd4c4ca796803f/zeduxabonalumaboniduwike.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/4ee5b16b4b2a97bf927d48ef90b28ca5/buvarisazi.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16080a36192c13---2434445730.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/85ef6cfc41c814de094c2084265cf381/vadapifigevomowilaxavis.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608042b2063a9---76586594643.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/laieok7hc86on886s4a690l5f1/nagawadupurowulotak.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/kujatizijivokutomuxowi.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/e0944402e671d0e41cc4b23ec009e83d/29737009103.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/0r1dmmgsiqg38pfmn62663m8nk/nupopaseziponubavinifusew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=storage+administrator+interview+questions+and+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_off0000eb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 11020 bytes
SHA-256: 84bb6a6f7a771576ab095604bda6bb206c30f3e4a97a5155f0367fd805a2cd3b
font_01_sfnt_off00010446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10446 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C58 17292 bytes
SHA-256: 5c358d9dac8cb706822b1806cf1b35e68a54615c19c9dbb17b26211bf81e809d

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