Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f6eca7910b619a…

MALICIOUS

PDF

77.1 KB Created: 2021-09-06 16:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 52e5ba0c5ad78cece43e68b04d7d5b9a SHA-1: 492bc5b3d7a485fc3fe91e1184f763562be59dc1 SHA-256: 98f6eca7910b619ad1a59b9e783c08da2c2b8f7196729fa3349c1dc3d1fdad6b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external URIs, many of which are hosted on disposable domains or compromised CMS uploads, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code or initiating redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ivepe-elearning.gr/assets/UserFiles/mainHome/file/pubimutupapezagomu.pdf In PDF document text
    • https://o2opr.co/userfiles/files/51415732523.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/laxupumalorinizaxifobilo.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/54938001392.pdfIn PDF document text
    • https://psihodesk.ro/ckfinder/userfiles/files/riladaderovapopirozorugu.pdfIn PDF document text
    • https://renewone.de/files/murakesepijewebasape.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/428e2d73aad7b3c04ec06c0a49dd83e2/lebifogamavulozowaj.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac210832bae---80396367287.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/jojilujuvepusu.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/3io0sccp86ur4mt0s68924f1h3/49493364249.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/metogitovaf.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a36f69f19b---xujizorukazodes.pdfIn PDF document text
    • http://apogeeconsultancy.com/upload/files/favomizedonasewinegalom.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/3765757600.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mexozoripagiz.pdfIn PDF document text
    • http://seritour.com/rsm/files/14003632793.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/nijosepanimapurezedexesu.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/93511420886.pdfIn PDF document text
    • http://sieuthikhoacaocap.vn/upload/files/pofozufowupudew.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/87545915303.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021052319582870554.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/kg4vcjl6sser453qj5hgvh97r0/sezimovimizedaloduxuz.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/43974363586.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=john+amos+comenius+biography+pdfPDF 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_off0000c45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC45A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC71 11268 bytes
SHA-256: 3cc27f30ec702fdf4c49182c3f68c0ba9ad200c15852cad282957bde1ca2cd7c
font_02_sfnt_off0000f647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 18376 bytes
SHA-256: 5a4269793c077b64656c2da0b4d956b4071cf9046b907656a25ce81f4020ebf0

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