Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb1539d9af1c7a8…

MALICIOUS

PDF

89.0 KB Created: 2021-07-23 16:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5bbbe781a5f23a963f3046b50cd5c572 SHA-1: 0fa7d7e89c937b5e85b69544abdfd3c38bd7aad9 SHA-256: dfb1539d9af1c7a8ef53075660841b37280f77542bfb79b469e8e5be0794533f
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, pointing to multiple compromised WordPress upload directories and disposable hosting sites. This suggests the document is designed to redirect users to potentially harmful content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://weblative.com/wp-content/plugins/super-forms/uploads/php/files/3vlbgfrfd92dnrm7u5rhm0f2p3/puwexo.pdf In PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/926d091c669e2ab7e81fb6d0769e527b/nebilejizagunasaxig.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/82151306381.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940b9a7f6f5---jejaripofubujawonojigir.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdc75af0d5---muvorogotefeliloxanejugo.pdfIn PDF document text
    • https://dineflon.com//files/39833806099.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/61655427032.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/vp5ntaj4qt0i6kqsqtejatvu3f/jigodow.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/8b1ca30dbaeb66c6a2dd12a54db8b5a1/demifezirajexurefiset.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc13a1f705---13142980292.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/0ioalfb721gr5fet4988g9pg1a/7278077575.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608913117df21---tokabolobudozafor.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d061bcf37---12208470322.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/74317969227.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608115d69c685---83073571926.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/942a07e88382ee5bb0ffed2e111e2fbd/kuxafomisiwixen.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/wuravululelawoxejuf.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608056e8159f6---57646180797.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/74077idk7arm7tub10hlvk6hlg/76969676154.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/28939212197.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/11422639934.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/80833090296.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=harry+potter+and+the+cursed+child+movie+2020+castPDF 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_off0000f49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49C 17728 bytes
SHA-256: 49d51c1d116457248e585e92faabbe9571fc98865ab65a4f90c55483be32dec1
font_01_sfnt_off00012347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12347 11292 bytes
SHA-256: 05ec8f6c26562a1f99a227eb4539a89c8f7fcdf823521860ef1be8ea986c0540
font_02_sfnt_off00013d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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