Malicious PDF — malware analysis report

Static analysis result for SHA-256 615ff76646322cfd…

MALICIOUS

PDF

86.1 KB Created: 2021-07-14 00:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c5a8d8c25dde83f1740af4e69506e729 SHA-1: 77650329a1d41e6b36a8196c10a22129d47f9037 SHA-256: 615ff76646322cfd45d7063dcb71b71a674f199a8a041f65fef9338b189a18dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to potentially harmful external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/2ab532cd7b2961bf0e9234f4e4ba18c9/xonavuwugiroramatovole.pdf In PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/6e7c3d9795105280043b7e8890cd6e0a/xitemarebeposokoxinatatej.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/wosuxotesuxinorexozev.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/iu8jnbr0bksk9usl7br0uif01g/detexokeg.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/16gst164m5crusj0ag7cma87rj/wavubolopetozunefigibev.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/pamara.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/shmhgscn5qariu7kfshf643afo/babesiduxanitobekiradob.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/bddd9528d6cefd1d1eb43c64ddf8a51c/5668477949.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/5f6cb2379a9fdfee788ad6c03147cdc9/nawujaverowuzoz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba8e0d1683---21026880504.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/4505ebf467c3674530c9896213bbdf2c/wogujofo.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/99mjop9bkuuse1lhagirkqd2f4/21122654630.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba6d5af01c---82356063846.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/0t6q0a023v0ncssqpvv2ofa1kh/97675118298.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c32b0a65301---79339267019.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/xizirug.pdfIn PDF document text
    • http://qachs88.com/clients/58271/File/zebixoluxajizudoga.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/jowaku.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/e65d71522e263850384fe6480c1c3cc1/luletinonubaxurexifizosu.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/2e8bbf41fb7d57daeff8cde2f55a7767/28743685066.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1aa669777b---fisirimolasosewebibexeba.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bf84be248b9---gatodixukidazip.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/32619843110.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/58643763856.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8bbb5bca6---60760120336.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=homemade+remedy+for+constipationPDF 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_off0000efc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC3 10840 bytes
SHA-256: c1eb7a968676669e226ba7d4fb5c2b66b82b2f08e72de45f7a2389d48e46697e
font_01_sfnt_off000108be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D0 16384 bytes
SHA-256: a857eb36f02c24f8a726bd21d9b6d0de090d97dd9dfa484f57f2c2a487835b66

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