Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb12876914951af…

MALICIOUS

PDF

94.4 KB Created: 2021-09-03 02:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7b30afece1b391b2b1ce7c0a8e1536e7 SHA-1: c8868357b6cf5cd7b5b49cd3caa8b24f7144ef59 SHA-256: 1eb12876914951af226a55388609e8c4fb09cdc5faa8814b2105842c469997b1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of multiple links pointing to potentially compromised WordPress sites and other disposable hosting further suggests a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://dermalab.pl/userfiles/file/94505614808.pdf In PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/44431c450545642c9413ab486badbac8/puboxusodigowiwise.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/77777122976.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///66616201341.pdfIn PDF document text
    • http://kappp.ru/js/ckfinder/userfiles/files/32202751288.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/16fb2d9ae2855bf43cb3b6bfaaa8600b/10386413260.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/vurajaxugigunobekolobig.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/161237e39ca72b---76212594807.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/62297504455.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/1021471710.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d243e161b98e2c837db54680400feed5/8855933270.pdfIn PDF document text
    • https://kaisar168.com/contents//files/mosevasaberazab.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/85267922945.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/mezibu.pdfIn PDF document text
    • http://bociany.sk/media/file/zakonelomipinozulofasi.pdfIn PDF document text
    • http://thongthien.vn/upload/files/kitumapizifegeleze.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd694a9a6a---korisaxinafag.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/57145823407.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48e68b3b99---duwusufodunozixasizifatoj.pdfIn PDF document text
    • http://ourconn.com/userfiles/file/202107291841225232.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/1ddb282f58634c39ea5bc98f5c7139b8/keteropegikefu.pdfIn PDF document text
    • https://dm288.rs/slicice/file/57254361164.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/54231471737.pdfIn PDF document text
    • https://fluffy-chins.com/images/file/nokeritanawezofarugajekev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=lunchroom+fight+pdf+answer+keyPDF link annotation
    • 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_off00010afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001230c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230C 17712 bytes
SHA-256: ca964177bc48aa378041f651890f10431ae24db27abd1f315aa40a83af4e734f
font_02_sfnt_off00015156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15156 11372 bytes
SHA-256: 8ed1a6f313c79dd8ce2feba7700636150a12520eb69e969825b2638915488949

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