Malicious PDF — malware analysis report

Static analysis result for SHA-256 2330119650759507…

MALICIOUS

PDF

82.5 KB Created: 2021-09-19 06:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fe927168375e3959b45bf1081a265cc1 SHA-1: 4c2b4316a135de03a40caa6d1082c5d06f7386e7 SHA-256: 233011965075950727763be250d3aa6276d0de4060b1382dd3e0bc1e5d783c1d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of ML and ClamAV detections further supports its malicious nature. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=fake+gps+go+location+spoofer+pro+apk+for+android PDF link annotation
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/mesutoseramixinaruna.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161469e720612b---10124041022.pdfIn PDF document text
    • https://foulardfotografando.it/file/63297906773.pdfIn PDF document text
    • https://electroagro.es/pub/files/fugujazuzimekuxudep.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/5b2aa1d3f3b63c4da5cc9d09282a3920/punuwupexixis.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/fumarisedisatuzaw.pdfIn PDF document text
    • https://domilot.com/uploader/files/68634308300.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/rixofotinivori.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/saviwodafifejudib.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/87082233025.pdfIn PDF document text
    • https://granitabrasive.hu/editor_up/popezomelinazabibu.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/a62b85290646022675802574baeaca8e/gebomosibalutatikazunozuf.pdfIn PDF document text
    • http://tano-cable.com/d/files/97401043256.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/16643931929.pdfIn PDF document text
    • http://griesvoegwerken.nl/UserFiles/file/gokudumefex.pdfIn PDF document text
    • http://tianfonmm.com/d/files/nefizoroxisezatag.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/gupewi.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/50343281162.pdfIn PDF document text
    • http://natalieshuff.com/uploads/file/84104367280.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/52633533920.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161446638e1802---56530388093.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/sidexog.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/732150249.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_off0000da94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA94 10864 bytes
SHA-256: 78ddf699f63a87ad50252cad4fc16d06de1c3748d8dcacc167e28d385b979d1a
font_01_sfnt_off0000f394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF394 18912 bytes
SHA-256: b5268528b642d71e423974ed7de903d8d5378eede52a61ef3e50e03f73839c65
font_02_sfnt_off0001245d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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