Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a7fa206913b839…

MALICIOUS

PDF

82.6 KB Created: 2021-09-17 22:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 31bd7f945312869233f4b6198052a40d SHA-1: 209803f0bd72cc453071d8e07f71490e74ddec41 SHA-256: 02a7fa206913b8393c185ad00a2ac113fbd869ca6e2bf7bd4263e35ea33606e6
172 Risk Score

Malware Insights

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

The sample is a PDF containing embedded JavaScript, which is often used to initiate malicious actions. Heuristics indicate it's part of a link farm pointing to compromised websites, likely to trick users into downloading malware. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://catamma.ru/uplcv?utm_term=bobby+tv+apk PDF link annotation
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffe970a513---94338106740.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/88748415690.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/luvidoxuvanudebijuku.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139bb42a8a13---pafivevinakijomabupewe.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/mowadise.pdfIn PDF document text
    • http://www.tecnologycenter.com/admin/uploaded/fck/file/60509776629.pdfIn PDF document text
    • https://best-label.com/upload/files/89540714225.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/vanizalalalugelitelasum.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/161433f1303f14---5579357491.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/77210499690.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/viribotedovafe.pdfIn PDF document text
    • https://semut73.com/contents/files/votemuzewipugotow.pdfIn PDF document text
    • https://mekongtransport.com/upload/userfiles/files/70166924810.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/pamakewejimezufekusotax.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0f75bf33f---gibosedufenotaxapebu.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/68839420818.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/75549571148.pdfIn PDF document text
    • http://magicfood-cn.com/files/20210907182320.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d083bf1a26---bejud.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/88431166857.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/cd6b940cf2c7a45764885ca065ff58f7/depuwofoz.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/davipifegamapawijujuvaj.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/logojepojoza.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/nokafawaxiwenatanis.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/76250813204.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_off0000de03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE03 10068 bytes
SHA-256: bd66ef3578c0eb83ab87d61ef007c4b4c5820660547ccc7e12ea4793e139f070
font_01_sfnt_off0000f46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C80 18848 bytes
SHA-256: 0fdd05795d9bc729a2bf3e586a76cea3069ffcb22c7247f88d7b67434a7a731c

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