Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e0919878772b98…

MALICIOUS

PDF

88.8 KB Created: 2021-07-25 14:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 26adfc613434928ec3e130dacb742c07 SHA-1: c15188f57956d9863934d4747fb27e92f4756726 SHA-256: 74e0919878772b987adc85f3727f4cc56e92cffc565fe0d3f86de273aed47648
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to other PDF files hosted on various websites, many of which are identified as compromised CMS uploads. This structure strongly suggests a link farm designed to distribute malicious content or facilitate phishing attacks. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://natyabio.com/uploadfiles/4642043663.pdf In PDF document text
    • http://sanphamhanquocymy.com/uploads/files/nogomiwiwalolamijula.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/4a6a890ed45997a4ca80fb2b499a2e43/reteluvovi.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/aa77f7dbbeb86ab916279c6294df3743/24572149590.pdfIn PDF document text
    • https://ckmusicdesign.nluserfiles/file/606915665.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c77493117---sikegawexutegaf.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078406f942fd---xamomurogibebakupikanos.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/8301113607.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d6efc5fb7---67852681113.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-6/file/jebol.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/8adbc664c70410486f011e5d5947a2d6/jonuloxusanonaburuxojotep.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40552b3cf3---xomedawupofak.pdfIn PDF document text
    • http://www.depomatrial.com/file/25972590855.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/4d72db427b970f15dc34637339a08057/xejubesukisewogilepelulo.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/xaposukokatowafen.pdfIn PDF document text
    • https://edusfera.pl/upload/file/jozemosodanotu.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/mezadonofup.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961eb1774ae---jivegodifa.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/jemeselafi.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/765cce443dc7a2963aaa3b01e7abb0e2/dinejewodudazimuzovesi.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607461c1b2398---rujuvajakotepuxanesuzu.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8b5bca8600757de2e0df250cb8f4d5f4/94040328079.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+compute+gyro+compass+errorPDF 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_off0000f850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF850 16800 bytes
SHA-256: 77bd0b5ff2b6b159ecba6bd584ea5d72f26518925b45e03cb3b2c3f25d5b477f
font_01_sfnt_off00012447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12447 10768 bytes
SHA-256: 6cb6e0429e42eda9d9bc3d6590421666a4dce9330f611a20accb1e1360b9b563
font_02_sfnt_off00013d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.