Malicious PDF — malware analysis report

Static analysis result for SHA-256 32401fb2b5bb3156…

MALICIOUS

PDF

74.5 KB Created: 2021-09-13 20:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d6dfc6a1ec9c94db887a92df9aea588f SHA-1: 1d44cd338eaf7a4cc54a6843cd70a56a2eff288e SHA-256: 32401fb2b5bb3156a42c29f9bd0640d21b55f791732fc1ed65058d6bae876b66
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. It contains embedded JavaScript and a large number of external URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded JavaScript indicates potential for malicious actions, such as downloading further payloads or redirecting the user to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://infrive.ru/uplcv?utm_term=operations+research+schaum%27s+outline+pdf PDF link annotation
    • http://lerucherdesanges.fr/userfiles/file/77010475361.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/vosisewevonik.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/56903833467.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/nugeza.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/tasoroxemepivi.pdfIn PDF document text
    • http://itemclinicchina.com/ckupload/files/wimowazexezufurov.pdfIn PDF document text
    • https://moyaexpresss.com/ckfinder/userfiles/files/77545264936.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/nijovapufurabifupudanip.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/86455868514.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1613a641457b3a---18830003417.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/dijokurisubedosip.pdfIn PDF document text
    • https://textosolutionslinguistiques.com/upload/editor/file/45109500688.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfc992ecd5---bewutowinuleliwejak.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613649ce98f62---liseruk.pdfIn PDF document text
    • http://jayeonrak.com/upfile_editor/2021/files/labem.pdfIn PDF document text
    • http://euhoca.com/js/ckfinder/userfiles/files/mipegevaritapebovu.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/loxikomavabevuxarivijos.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/zefijogekulanufa.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/69902562436.pdfIn PDF document text
    • http://sbairs.com/datas/files/gaponoxugorixezi.pdfIn PDF document text
    • http://bckbytow.naszbip.pl/img/upload/files/61725735907.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/48638525076.pdfIn PDF document text
    • http://maydemtienvn.com/upload/files/vopoborex.pdfIn PDF document text
    • https://lazerom.pro/media/file/97803432919.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_off0000bdc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC6 11044 bytes
SHA-256: eed5c9aff82f1f3ae92e3f9aeca7aa40fbc0897ad8c55c6b2e4d7a1cef484f7a
font_01_sfnt_off0000d750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD750 17348 bytes
SHA-256: feb245c606b179eeb29c7a5a683d824a912e3a55a5962fcd28b6dd8a69ff6a73
font_02_sfnt_off0001045f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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