Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2dd3816a95de52c…

MALICIOUS

PDF

70.8 KB Created: 2021-09-03 00:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f55b03312dc28cd3a10609976f7834ad SHA-1: 661e34b34562673dca38128dc50706530f277b94 SHA-256: d2dd3816a95de52cec03cedffcef9d79d4401805aadd48aeb3ae130b370db0d6
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 embedded URLs and link farm characteristics suggest the document's purpose is to redirect users to compromised websites or potentially malicious content. The document body is unreadable, but the presence of numerous external links points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://oniceh.ru/uplcv?utm_term=satanas+mario+mendoza+pdf+descargar PDF link annotation
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210627060932.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/73228514156.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e14155d93---84420510800.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc4f0af7c3---wadilirowejivero.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7ttnbble7vr3ov4ao3bj04jom4/8744461660.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/jimojixasebeloresuvoru.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/komewufitisoxix.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/nanulezowevekemi.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/72463503717.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90b85dd052---velumo.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/hlolvnk8lnmf5jve65vs9r6ap7/bixumotonoweweb.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e8bd4a1c6a3---pajavajiz.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/etvgbcbmhd0kbbi24idslpe0k6/wabizif.pdfIn PDF document text
    • http://aimic.com/userfiles/file/zarejilekusakozaxizujawi.pdfIn PDF document text
    • http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/xebemonaset.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/19051539758.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a85bb6b89ca---garofuv.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a35f1a454a5---49203933789.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/pawomariwamujaw.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/47683972880.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a00ff03e24a---36273184154.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/787896b8264e44c830d115446d7997f7/lotetivejikitome.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/jafafudoluxenitev.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609de5c6c917c---56103048971.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_off0000b796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB796 11052 bytes
SHA-256: 83d3dc6fab5123b80c176bb833d5d63f86b5f4e7523e0bbea8d840dfae084b69
font_01_sfnt_off0000d11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11C 14764 bytes
SHA-256: 7e6f76177de7bba30c5b597d44910b7c785d016c8c1500652615388cdb59b919
font_02_sfnt_off0000f533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF533 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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