Malicious PDF — malware analysis report

Static analysis result for SHA-256 14912979cde42434…

MALICIOUS

PDF

87.6 KB Created: 2021-09-14 06:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 02c2999374a708fa846504ea43deb591 SHA-1: 9d30877320a5c28bdb4ccc832c8a667e0f3f6371 SHA-256: 14912979cde424342c2cfb14c1f916c743153bb9a10516ad01c4166e3948c16d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, indicate a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crysiq.ru/uplcv?utm_term=soul+reaver+2+para+android PDF link annotation
    • http://ackerviewguesthouse.com/userfiles/file/46480814812.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/98916913610.pdfIn PDF document text
    • https://studiopros.com/userfiles/file/In PDF document text
    • http://margheritango.it/userfiles/file/72890379539.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/gusamegixonerujavuv.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/89997163638.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/8b4e6ea5a61148c5b06141e292e1abd9/1731226486.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/diwodosamivuben.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/26434922645.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/papijejejame.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/kefovakabarusonekigun.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/jobofarukizeroxudunigupur.pdfIn PDF document text
    • http://ziva-muzika.cz/files/file/81815044068.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/junaditukinorolofifumuluz.pdfIn PDF document text
    • http://www.gobarging.com/uploads/textareas/file/32334882024.pdfIn PDF document text
    • https://taumed.kz/upload/2021/09files/2109060135014639185h89z.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/arfdm76tmk8066fjafkmc1dd61/39817828811.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/33606329190.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/40955873036.pdfIn PDF document text
    • https://phunhai.net/upload/files/11224527128.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/8f2467bcc620c83aa74c27870888fade/43910326134.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/51719430358.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/09/12/file/20210912_223403_121.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021962023306206.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/riwip.pdfIn PDF document text
    • 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_off0000f2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D0 17604 bytes
SHA-256: a86d0e52888c9a568b0d9dd156bc5b0b1b05b8162440fa0778e867044d230ca7
font_01_sfnt_off00012078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12078 10480 bytes
SHA-256: d9722079645aefed0eea644c6c07f931d3422fcaa1c44cb6a04748c09a099837
font_02_sfnt_off0001386a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1