Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf403652af00328…

MALICIOUS

PDF

89.9 KB Created: 2021-09-08 02:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5af85059e780a666fdc8842237819e36 SHA-1: fbc9bbe94a915a6896a365594ef2906c9b3fb52a SHA-256: fdf403652af0032863b71d6f2ec16e7f9a407748a3efd4b3dcf83f795b16a532
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised or disposable hosting. These links are likely intended to lure users into phishing scams or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=sin%C3%BCs+ve+kosin%C3%BCs+teoremi+pdf PDF link annotation
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1611d5d7143e9b---50426947488.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d77c67a06e1---lojaxes.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/83394968211.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/jibogufosodefumun.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/e0c3cb34cfff60149bc2a5fc72a38402/94640855819.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/33710311375.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/kupomalopupepo.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/e03d9bf9e489a518bf19b5d24e907155/27388423276.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/kamorijejokepati.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/2c8tnm9ttirnpm9qdballl38l2/37739884562.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/wefugetut.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/68301841614.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/9b64da1e3b4ee15090923d24ed5996ed/ripivugozidipogajutisoj.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/85100af304b4e410de924db95ffbc128/7098392807.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/95010056780.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be349e6a6aa---zarexibatazebe.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021730259237420.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/dobokokipavebamuxela.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/foxapudowoxurofedorerigo.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4fac39a36---25288775299.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/34412063774.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/16173974626.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d6a3713db---kogipapovikofofitadaba.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0f09a0424---52287163491.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/fowiluwopafugiwidejanu.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_off0000f5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C6 10876 bytes
SHA-256: 6765343fd4f9dbafe57997176b7bc5ede8445ebc91e4237cd0f8d889dd89303d
font_01_sfnt_off00010ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED0 19832 bytes
SHA-256: fa8bc94136484e702ba6c057139f629dfcd222787de78cda292a6cc2202fe52d
font_02_sfnt_off00013fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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