Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd4d56a2a81c36b…

MALICIOUS

PDF

83.0 KB Created: 2021-09-07 23:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 11ca4b21099057016cc7526d07650bfe SHA-1: 4fc895b3aeb6698cf114b95f7810d62ca76edeca SHA-256: 1dd4d56a2a81c36bfe73fcbf1d72b66cf927cdcc1eba0d39ca62586e498ca6c0
164 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 file also exhibits characteristics of a link farm, with numerous external URIs pointing to potentially compromised WordPress sites and disposable hosting. These elements suggest an attempt to lure victims to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://synerhu.ru/uplcv?utm_term=manualidades+para+hacer+con+papel+blanco PDF link annotation
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609b47fdded4d---18951686944.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16121c0cfad29d---pekovobikifoni.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/86556037616.pdfIn PDF document text
    • https://eetravel.net/file/sonotugojije.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/12951432988.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/c898d55dae85d74e3ac87c14379b136d/pisigisujibotuzuk.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/tajavasuxofuvipebu.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737e392ac42---19800830308.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/34537349794.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e61f470a4a---87859675705.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/7a9akebb754k809lg829nlote5/labanovowegusuvogomagu.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608929cee11eb---79181243172.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/nodaxud.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607576ab9041b---logalataxutigejef.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/88r6b9h2sjq5eit49f0cs5c9ib/28725012498.pdfIn PDF document text
    • http://gptools.net/userfiles/file/samuwamixuxijasisa.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/95933882241.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/nigebawoge.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/37337616895.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/24697312113.pdfIn PDF document text
    • http://bluefield1966.com/clients/26642/File/25583905703.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/mekasuzudobujorav.pdfIn PDF document text
    • http://446888.top/userfiles/file/rawojiravapo.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/bbd24f4beef4a2d88f0c873974928836/51443769262.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610443b4e7fd5---64322364118.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/88124267092.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_off0000dab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C3 19536 bytes
SHA-256: a54b6b6bf7f9f339bbf29168cd35c3436623dc23c5f705ae46b7ba919f687d06
font_02_sfnt_off0001242b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242B 10744 bytes
SHA-256: 17eb6cc7337d37c77be50e33cccca0258f2e3c04e42f44eb82552837e0034ffa

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