Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ec7da6b126a805…

MALICIOUS

PDF

78.5 KB Created: 2021-09-13 09:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 966d80cfb829ecfd46b17115e877dea1 SHA-1: ed828353818870f8f11df99c083d8f07a2b4339d SHA-256: b6ec7da6b126a805f2342655f6f6c790bb6933740974b044bc90cfb6f45b7117
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Numerous embedded URIs were detected, many pointing to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users to malicious sites. The document body was unreadable binary data, but the heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ketchas.ru/uplcv?utm_term=t55+smart+watch+price+in+bd PDF link annotation
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/febativen.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/53827791845.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/riretuzeremib.pdfIn PDF document text
    • https://photojet.net/userfiles/file/85359932920.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/kiruwobobarepatotupon.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210908053433.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/37695365611.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/72767302461.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/vulimatewe.pdfPDF link annotation
    • http://xn--49s538bo8ux8c.net/userfiles/file/74482295261.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/5387185462.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/09/file/202109040025326690.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/72533070228.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e855e4bbe---26408354029.pdfIn PDF document text
    • https://machinex-machines.com/UserFiles/File/datewokimijuvusidekiwo.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210907_061422.pdfIn PDF document text
    • http://skupka23.ru/upload/m/wewenitopisaka.pdfIn PDF document text
    • https://akgoz.zemta.com/uploads/files/jakoxifefeg.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/86c864eb76c4ad910d9044df6e4bc56d/78645335236.pdfIn PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/16334247153.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138e812f16b1---mesupebifa.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/dinizejejikojaguwuwinajo.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_off0000c892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC892 10936 bytes
SHA-256: 18f9a126c2e1add7a6c870871be5763984eaa7ed64dda9c71999e31a8cfc0727
font_01_sfnt_off0000e19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19B 19228 bytes
SHA-256: a0a7231770d6cff99986b2ea8656fbc1b1fd7e5994ffab070394e5651828e27d
font_02_sfnt_off0001146d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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