Malicious PDF — malware analysis report

Static analysis result for SHA-256 186abf3c30afb3be…

MALICIOUS

PDF

115.7 KB Created: 2021-07-27 23:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fdf0dac38a859ed6970e65ce0efbeef0 SHA-1: bba1a3eb673974f58a3591c450c8845d9e246dc7 SHA-256: 186abf3c30afb3be7c1a887c3abd8968e41f6151a01290975e6becb7fbe20c14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. While no scripts were explicitly extracted, the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b471b78dabf---10684036843.pdf In PDF document text
    • http://daiichilogistics.com/uploads/news_file/58066741574.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/cc87d1d629b60456abe1cf2c9e511d16/donisupaxarinizutopofezul.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/59570cc92be0db260e593abf1af28aaa/84386274995.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a08c5cc2a---83478732914.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/27f0eb9774d1c42745e46db6b07dbc7a/misosiz.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/219b63ab27b56666ce9415a3971442b7/tumomem.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/uasuaqfpevqd7horrbp6nrqe8f/jolavuwatubujuzokirome.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/a82b480b02d2e65612a8bdd5e9520aad/44421514806.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860e8810968---zutagurawewopur.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/47305429946.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2ced17c6b---38922118942.pdfIn PDF document text
    • https://egca.fr/userfiles/file/xuzikunodipom.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3cf1854b1---zixuxopununorenukoruwaka.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/ropejoto.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/74423357746.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/47995996852.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/835528e3f7bbc782b42547343a1c0b35/86341588495.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/vimivutexonuzop.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/23119345662.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/5v0rifu4remrke1vrq8vralgjp/20441751024.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=erik+erikson+etapas+del+desarrollo+psicosocial+pdfPDF 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_off00015d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D64 18668 bytes
SHA-256: f158d2c6342d8b8c34b5be350c3d763b49c98ba2e57b130ddeae6c8576054e3a
font_01_sfnt_off00018d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D43 10688 bytes
SHA-256: a0e5c28b36e695b844f6425da57bb81917667dcb88066b3e0bd117ba1d53e746
font_02_sfnt_off0001a5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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