Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8abead4e17febf9…

MALICIOUS

PDF

88.6 KB Created: 2021-08-25 19:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: deafc3747259782d491b6610007d4cdf SHA-1: 81e1af083459b0447f73809bf6c69611ae3615a4 SHA-256: f8abead4e17febf916348f3943dfd65cbc11195da27b2487ccf08b38bb0ca5c4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm, suggesting a phishing or malware distribution attempt. The presence of embedded JavaScript, along with the ML classifier and ClamAV detection, strongly indicates malicious intent. The document likely serves as a lure to direct users to compromised websites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://coretry.ru/uplcv?utm_term=pinoy+movies+through+night+and+day PDF link annotation
    • http://ciarajewellery.com/editor_upload/file/72544440400.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/29421084336.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e937cb53ce9---44529115996.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/lonogosogureselomonobuxe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6990ce592---valesijajawum.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/joxumesizogu.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0720c18c85---2723325783.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e9443491774---61266966283.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/pakesudepufev.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/zikejuxe.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c084f6a3d84---konalokubu.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/72561611382.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092efe769aa8---tekodemokitanel.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160abba20a91fa---74586629417.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821c1c06136---dusorapilarapem.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/cc240ff1873a3062aef99bf44635cde7/30908539544.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/67463130885.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202108211845502284.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/gevotavebawineponologef.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/s6jc7ipikqkoaoedq0kpuf8lq4/63094210645.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/34137579724.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/34503386313.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/pofawosaziderovidepusolav.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/e33e851ea26ccb81373239dafc2d6dca/255232472.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_off0000f3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A8 10932 bytes
SHA-256: b60b149dff136223745111b27237a9d96b5b600daa368512fd7ce754dcb8257d
font_01_sfnt_off00010ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA4 17364 bytes
SHA-256: 8d91969cc0caefbff744e503e8dce8f9f6ede3d2474c991c55706d3b1f5d85f1
font_02_sfnt_off00013a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1