Malicious PDF — malware analysis report

Static analysis result for SHA-256 6deab2282fc9a59e…

MALICIOUS

PDF

80.7 KB Created: 2021-09-16 21:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f3faf161b690e9886be46eeaac22aeb1 SHA-1: 8092d92e87078d9e12a7cbd20a4f7ad45f456bde SHA-256: 6deab2282fc9a59e21ec8a0f6779e0accb70041082a645d024043a35e168ab05
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://queure.ru/uplcv?utm_term=forza+horizon+4+download+android+apk PDF link annotation
    • https://henseltech.cz/userfiles/file/gurorilivem.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/juzefaxiromovonabinoli.pdfIn PDF document text
    • http://mcutech.net/files/nijemirulemetib.pdfIn PDF document text
    • https://cristalensi.com/public/File/defaniteminusanegutob.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/4282940188.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/21861707117.pdfIn PDF document text
    • https://www.miotsukushi.or.jp/system/ckfinder/userfiles/files/womagi.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/74746796599.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/ludogipowopazidobadu.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/85492313450.pdfIn PDF document text
    • http://knipia.com/userfiles/file/81483226589.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf3e7e6158---89608559707.pdfIn PDF document text
    • https://hexema.com/FCKeditor/file/medovu.pdfIn PDF document text
    • http://videotour24.com/data/fckupload/file/nazirinobupibejedatoga.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/97535071046.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/vasote.pdfIn PDF document text
    • https://netlandschool.cl/files/46583633091.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/g5gl22rnhvsdm5hrgkdm76ahm4/fifapubetawam.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/jilaru.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/leduxosebepavelitezofew.pdfIn PDF document text
    • http://surestegc.org/documentos/file/24697739833.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/83657978286.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/rium6gqvn5a0ednjpfrrl7crf7/ledureful.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_off0000d929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD929 17008 bytes
SHA-256: a51981118ee7e60989a258afd2c357305ad9673230c40abb280e6765ff084f05
font_01_sfnt_off0001055e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055E 10384 bytes
SHA-256: 6c66875040e2999449cfc5a76afbb705ff91e7c3c2d6414f3b811b6b2ba2c562
font_02_sfnt_off00011cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1