Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3eb9dc420e3460c…

MALICIOUS

PDF

76.6 KB Created: 2021-09-25 12:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a30be18acd30019d5851118ad55f7e2b SHA-1: f880f16608dd3d963058d1ca2379e3b72329c59c SHA-256: c3eb9dc420e3460c289fee9c7167d1c87d1aee01a765848c367023d8e3e44433
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and link farms indicates an attempt to lead users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://fittbikese.hu/files/file/kasegusixobaf.pdf In PDF document text
    • https://nyig.com/files/file/63690402377.pdfIn PDF document text
    • https://yuvasarkar.org/userfiles/file/57101998373.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/fifotafojisarezet.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/v00hi78pkjqgj03uprrc1fk4uo/wisokebugozava.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408865b52f8---59483223409.pdfIn PDF document text
    • https://djecijagarderoba.me/userfiles/file/44965432415.pdfIn PDF document text
    • http://erimti.com/userfiles/file/60284767782.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/radogidadetexora.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/543ae7003df3137f9c6fec4fbb2862cf/dumuvikegerixu.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/161454b32ac4da---93516207843.pdfIn PDF document text
    • http://studiomanzetti.it/userfiles/files/vurafusewirigamuf.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/xafajagesulano.pdfIn PDF document text
    • http://studio70.eu/userfiles/files/minibofodibimutufavunez.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f4e456a18---vigonanit.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/kanegitil.pdfIn PDF document text
    • https://tessuno.com/upload/files/6134add559ee5.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/boripurivuxepuwedokafupux.pdfIn PDF document text
    • http://jlssj.com/qianzi/upfile/case_editor/file/45884491292.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/58775302711.pdfIn PDF document text
    • http://falconltd.pl/cache/file/pavopivolosejevufiwot.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/vuh25ltc2eknhjdbjnu19ngg01/16523096063.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/kefefopabokusulixujimepi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=paket+internet+smartfren+andromax+m3yPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/9cb85c852d672e7f5b13f4ae616f749b/53658116123.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_off0000c10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC10E 18888 bytes
SHA-256: 8f7d21b8d73f0e8b23574df5570775449111286b8edc87d65292ad66253bbd20
font_01_sfnt_off0000f31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B32 10952 bytes
SHA-256: 0e8666a4654654d4232bf271ccfe2dadd479a084ba9304bfb26ad5c2b29fb266

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