Malicious PDF — malware analysis report

Static analysis result for SHA-256 7124857a743278c1…

MALICIOUS

PDF

93.8 KB Created: 2021-08-02 00:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 16637fce5d7a4575e1ebd3e48db919cd SHA-1: 4c0a3784fb2f5e13ac133083ee5555da6e7490d6 SHA-256: 7124857a743278c1dadab6bb5958f63502eb7c26310defd17a56e7ecd8f6959c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The primary purpose seems to be redirecting users through these links, likely to a phishing page or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://classiccar-jp.com/js/upload/files/jisozefonizifagolapazubi.pdf In PDF document text
    • https://callalilyvn.com/upload/files/kixugekapezax.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bd04e419537---73070670120.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/tuvojoribidipasulejalasa.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/gg63i43molju4loq2lrv1ltmf1/rupitegufivoxibanorunep.pdfIn PDF document text
    • https://osiindia.org/ckfinder/userfiles/files/25057536006.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/figebow.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/xodobifivud.pdfIn PDF document text
    • http://aimic.com/userfiles/file/47159259889.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160865135535a2---dapedupugurifebed.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202161994442270.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210725111647.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/vuwenuzofodatoxotize.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/95230131486.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/32291795674.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/sewebi.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/42637223454.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/lokidelotudobaxerebemej.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/1d4nvvobhob7v6h346uflim2ou/28250614430.pdfIn PDF document text
    • http://websurin.net/UserFiles/File/20056700704.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/karitaje.pdfIn PDF document text
    • https://retta-bg.com/userfiles/fajobefunoli.pdfIn PDF document text
    • https://moolans.com/uploads/files/mirowugekepinidugiwisiju.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/jomibovejifezax.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/2876197236.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=como+hacer+vida+little+alchemy+2PDF 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_off00010880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10880 10692 bytes
SHA-256: 0caa625e09ee4beff7603944a43185006261f728d42d637b87abd828e65587db
font_01_sfnt_off00012120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12120 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13932 18056 bytes
SHA-256: e427c26928cddd87590740ab0e4f1a45fc3b35cb5ff4d2fcdb21b4c67fe69860

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