Malicious PDF — malware analysis report

Static analysis result for SHA-256 2018e929a34f660a…

MALICIOUS

PDF

87.6 KB Created: 2021-07-01 17:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 0a7c3be16aa2af7f069d3a4f44eb6b67 SHA-1: ee067d69894202ffc1577525bfac9309bfcde344 SHA-256: 2018e929a34f660a34ea6729a68ebb2eca23b3ce235d2cd03c3f92f46c41ecda
184 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple external URIs pointing to compromised websites, indicating a malicious intent to redirect users to potentially harmful content. The presence of a link farm on disposable hosting and compromised CMS upload storage further suggests a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pixomot.ru/uplcv?utm_term=graduation+convocation+meaning PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d684149e8b4---wiwexebazasup.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4e7fa45e9---zuzuxivazaxaresu.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/gunubo.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160932b13438db---menel.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/magilakamawujom.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160becb9b481b6---govigokigamaluzararaxaleb.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa56642371---16895067568.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/79338354682.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b61480246c9---wekirofarodaxuzerojadub.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160754d07c9973---935789863.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/ced0b84bc86e1dcbbce098bafda4e2a7/94048623746.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/jixilew.pdfIn PDF document text
    • http://jarosi.hu/files/file/jirulabejurukutuweze.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/55388641879.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12dbe9e11a---61942206114.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/625c72a5bf0edc8dfcdf401b34c2d533/6521397868.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210615022746.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b919fdef83c---19292711615.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/folusuvelabituz.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db07003037---88964904016.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/f35a39be3a9e3eb95b876991ba5d9656/tinexufujoreguzuzobivosu.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/rujuvunofatixuv.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/49jn0nle1jrmprlpt8rsjeo8m1/3058017466.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160d94b70a5d4b---83302995736.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/saselefodekotaguvexareg.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_off0000f348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF348 17064 bytes
SHA-256: 3f75fa03d379c7d678a149beb7e63c4ec1cfd9f4cf9b26b3e1e0782725967759
font_01_sfnt_off00011f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3F 10704 bytes
SHA-256: ad09b9154a856d618ef852a1ca701dbcf118366764e31cf27c979e148ee0a46b
font_02_sfnt_off0001379e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1379E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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