Malicious PDF — malware analysis report

Static analysis result for SHA-256 329f702f77b74c9d…

MALICIOUS

PDF

138.2 KB Created: 2021-06-30 01:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0ad0e420cf3c761ade643542c5d5b1b7 SHA-1: b96b72b7a7f23676d80ab1171e3edcca11051b1b SHA-256: 329f702f77b74c9df49eac1bc958140feb1143089a6c1d7a41e0d4ed2f80d3d8
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to trick users into downloading a malicious file. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted, but the presence of a 'Download Now' lure and the compromised hosting reinforce the phishing and download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://namthangbasaltstone.com/uploads/image/files/gazedasaxarefu.pdf In PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8004acf59---736185879.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/69140e66e811c7cf075f49effd36c107/1423980635.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/29849958372.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/3ji8f4nt9duvquepan2r8t22ta/82891034046.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/43c2959db407ace4056f4f845e9fbee5/nelaj.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/14080183522.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608060ab65011---21064899982.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/gg72d7hh7p1c0vtmuc9v8lnrva/19235759689.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075ce8e7ac75---67514227691.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/8495f6ca87d503ed43e485cde24ab182/75540027126.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3182eff09---xosifi.pdfIn PDF document text
    • https://dannysacademy.com/ckfinder/userfiles/files/dokasegederigedipidi.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/5c4fc84d258e215c7685d6f6e1ee1aae/peneninowezejov.pdfIn PDF document text
    • http://k-barrierfree.com/FileData/ckfinder/files/20210630_20BAEE8C709EDE8E.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/47937466931.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968fa50df7c---43178090595.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/ctsnsokrcfhv6uvp4vtcl5uj86/bebanolopojukute.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9932e3ecb---rukepetudodogona.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/6hn5bqqcc2v3vpthrtidckqh47/waluzoxijenijosevijokamum.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/lasogexijuveruwejoma.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/94c9de195c8c8bed0c832b2953db7b91/33855735171.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/19m6sc332jff3tludhpm4c03l0/rebom.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c08d11a84---39196325759.pdfIn PDF document text
    • http://highlandcougars83.com/clients/2/26/268573c5102cd00412bac87cee9346ec/File/gitofatitem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=project+report+for+bba+final+yearPDF 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_off0001b9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9B2 18428 bytes
SHA-256: 6a27f04d4a8d1dbb191e20056dd0cbe9d5b7e5cf1126150ac09e4e059b684aae
font_01_sfnt_off0001ea96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000202ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x202AD 10688 bytes
SHA-256: a2de645ca4374ef2f7eb2b25ef92d84f48c54ba63adf35303105574cb563e201

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