Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a453c71751c5d7…

MALICIOUS

PDF

88.6 KB Created: 2021-06-29 04:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 665419839500bf8191cfab6629563754 SHA-1: 2d81c4e7cabe8272f69d10aa4fb8008c9ca615d0 SHA-256: 82a453c71751c5d7a9d57c45ea833f03f6c7307cc98b0fd1ad1a6c06b61b0c64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. It functions as a link farm, containing numerous embedded URLs that point to various domains, many of which are hosted on compromised or disposable infrastructure. The primary purpose appears to be redirecting users to external sites, likely for malicious purposes such as credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://puppiesulove.com/clients/7/7f/7fa6d7836ea929643a3c23f4562b158d/File/39571959578.pdf In PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fb97bde28---vosugarukuwikemawufivog.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/daxuteluxisezigob.pdfIn PDF document text
    • http://honda-vo.com/upload/file/40818934788.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/4495479195.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/82c15c54cbd74bd7ff835db599df3430/58009904771.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/tiwiwiketoba.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/16522777700.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/096ddf3e9b7a07b9ccda7317061d593b/39505600497.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/237bdcd20fabea3f9cab174309de2b8a/ruvetimoserozoda.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7fb909a78---78863830265.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607de9152d67d---2514208759.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdacfa2960---tinozuritut.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d615f0cad---xufewikejagula.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/mibakuximejujaguk.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/c17aca8e8e24ec176a5411705bc9f9ac/80125102547.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942b12820b8---75021066706.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/41229497292.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/53467071455.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ed54c2cbb---15225889228.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/0ab8a53a9319538017ab4b8fbb334d7e/26345826092.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/b3abbeb9eb399122bbf5a675a0af05df/67646146283.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=complete+mathematics+for+cambridge+igcse+fifth+edition+extended+pdf+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEE 18944 bytes
SHA-256: 23ab5bac812ecf06d0d57f0fce7132ad772f05cfc1e06741c2b4604767e79de4
font_01_sfnt_off000121a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A8 11428 bytes
SHA-256: 81a3a5c40d1aa1a20feeb5c3357248088307bede2fb29633fd52bd5881a3d620
font_02_sfnt_off00013c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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