Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f6d59206c0179f…

MALICIOUS

PDF

89.5 KB Created: 2021-08-13 01:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1509d30b0c05f270698c53cdd3c896bc SHA-1: 8fe938885cf6e549b98015f7c30a6ea6a36cb008 SHA-256: d3f6d59206c0179f49108221207a790c1bf2f86a901a193c38578e4d21e55777
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting, likely for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 8

  • 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.
  • 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://infrive.ru/uplcv?utm_term=mardaani+full+movie+rani+mukerji+2019 PDF link annotation
    • http://sy-smile.com/upload/files/63039459967.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/93e7f5266886f356382f5d0a3cebf9bc/87706748360.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/dererijisera.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/mogurijuma.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efef76b73d0---34696938042.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/9rjpk5tu42oh7681925bcs7hhj/36680767817.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/d609214136c2b951104d54e00b23f000/bavusolemerixuxesabol.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/kerebufem.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/zowerepikoxotivusedije.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/80797040937.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/ganegegaloboxi.pdfIn PDF document text
    • https://teamcode.net/upload/files/56554407022.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/66731631853.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/d7um3f8dd5ruam7rs7k9a4l80g/86021166414.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/99875612712.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c305836d5f---dezil.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/19395840817.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210719_5F62583A3EA2C037.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6de6c8190e---12027484159.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad31620a5d---jidafivoretijukek.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a8581d4a25---31960283396.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/d79d76a30c7e225adea51bdfc161e230/18404347129.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160abe29db1fed---7034324289.pdfPDF link annotation
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/m3ab82jee3rp9ekmdjj5laomuh/46910229326.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4ba67a91b---nuzewafanekipisum.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/0aeb45d236ea12d73f6b394a7d395227/babafasodemewokuvexifemow.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_off0000f867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF867 11092 bytes
SHA-256: bf843373049fb9259dd316ab71ca43dadd5e360de283f69106570aeccb614183
font_01_sfnt_off0001123d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123D 17392 bytes
SHA-256: 71faa7f781414fcdb94701333737ebd5acb15e670860dfc0ac4716990beab2c5
font_02_sfnt_off00013feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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