Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c75e6766c139ea…

MALICIOUS

PDF

78.3 KB Created: 2021-07-05 23:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 8d2ec2289f6071d8ab1de3fb1c44fd4e SHA-1: b56c9f89030e9d5f66491096065c11462ac0adb0 SHA-256: 80c75e6766c139eaa0248afeac009d6ae816ab96836dbcc5e57efd9428c7ed93
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://globalquestconsulting.com/userfiles/files/zukoliwajakegerisepokemek.pdf In PDF document text
    • https://juraganmonyet.com/contents//files/77291810732.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160753265e203f---junopikevobabib.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/b3p25341e9aevvdgrc6d7ffe7p/96143961019.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/81926852253.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/64eae0793f7610420197ec05fff4bb2b/80064517913.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/34474816131.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160da1e58c5591---zusonopedage.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16089c728b95ba---8138664152.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/musugo.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/2f61c778b897c4f5f04a594c3859f21c/nofalomumezatakefebixig.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/rivedimegopuduguta.pdfIn PDF document text
    • http://short-story.ru/upload/file/vifekumudotinatitumikok.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/vugedudaramizimetado.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/daxakorizedowajokisi.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc60c7c1bd---24172472728.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef290f1be6---14426539481.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/suruxatijima.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/66057592390216b149d98b9b8386993e/sawerevow.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/kmob439amegkhgq8sjngtc0u08/61714734505.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6a114d2a1---21897664261.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/90419289927.pdfIn PDF document text
    • https://beaszemin.com/files/beridakubadikukowa.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/v1f72t0ev7p4638c7ktok15o9k/furedanijotexoxejogusida.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=ncert+solutions+for+class+9+science+ch2PDF 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_off0000d01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE831 16508 bytes
SHA-256: 9279a8ff6d906560548edf13e3a42f3dfa5ad3299e1b0f2b3b715ee651ddd362
font_02_sfnt_off000112e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E1 10800 bytes
SHA-256: bd11d58f23a68658ae47aa6b0a4b97fc4266e1fcf2ea00cb1a91dc096f5b5f92

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