Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dabc814b23ed618…

MALICIOUS

PDF

83.7 KB Created: 2021-09-03 19:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: d6c2c21e1810e6dbc778b6e250c5313f SHA-1: db9e406f169110bf9affb8541ad65b75e129c063 SHA-256: 1dabc814b23ed6181f3d07fa1ff8846318505cfc75169863c433e99bd1b89d8c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML score. It contains a link farm pointing to compromised CMS upload storage, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16087713a13f29---69611260049.pdf In PDF document text
    • https://ecosolar-energy.com/piceditor/file/9427683324.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/26443215224.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/24838418468.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a227144043---pebixivagamokozafoj.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/440e57c1a213b42bc2b5d9429098a0bc/zipajivajuwodetaxapo.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/ttqi1cutd8li4fd7tc3a34vgtu/wononupofo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a681cad2ad0---latofapatelusisagixep.pdfIn PDF document text
    • http://fgosvo.ru/files/files/podiwenumavadibateki.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/e79339c17027adf246177c720c40be89/vufiluj.pdfIn PDF document text
    • http://residencelesaline.it/userfiles/files/3361987693.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/pewaserigonumazikunez.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a65ec6f010f---91577223662.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/3492447610.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/11219061856.pdfIn PDF document text
    • http://termitecontrolservicebd.com/ck/upload/files/26203509869.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/36595294579.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073900bb1ce4---85562843517.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2d8ae16ac---fesif.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/mujiwupeteloma.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/60974689945.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/cfsd2op1ncomkgvf03s922mou1/76403787158.pdfIn PDF document text
    • http://hbaoge.com/upload/files/mufigewebuzore.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/643c157f6803d06146dd19ee8f46dac1/sofujesunomoda.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/im2ln96bkpqf884sgnbi7912nc/83430049244.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/28095736261.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=steven+pinker+enlightenment+now+pdf+freePDF 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_off0000e2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D3 17224 bytes
SHA-256: d281ab7c1de507db61bdc4987a7b8dc6c737c35ae8c70eee62889bac7b179990
font_01_sfnt_off00010f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12775 10932 bytes
SHA-256: 4b3f788fd5dd54054d2e25cf3bea486fe770453cf5b89318cbc52b6c30084a22