Malicious PDF — malware analysis report

Static analysis result for SHA-256 cade9e28fe5c8886…

MALICIOUS

PDF

72.5 KB Created: 2021-07-19 10:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1d07f2df402c1ea980762e36a02d3275 SHA-1: 2e2641f4ed410647dacb82cb68414be5a62cae91 SHA-256: cade9e28fe5c8886dcc6ea765afb6c9ac8672ebf809ec3b89bb3399ab8058dd0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains numerous links, many pointing to compromised WordPress sites, which are likely intended to redirect users to malicious content. No scripts were extracted, but the presence of a link farm suggests an attempt to lead users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/np0hetssckkqegmbadk62j8l7g/nugefofuwubumabevonaliw.pdf In PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078219482cdc---jovatofoxetuk.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/54346988053.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/hqa5chbd75iqkj67h4shd7p4pk/bigudamugoloxeveka.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf45aaf92c---28073808805.pdfIn PDF document text
    • http://starrsgazette.com/admin/images/file/20986482293.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/83t1r1vu19cj24cf2026rvdnm1/65216457852.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608dff3b1548e---mesosetesibopo.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/81103799484.pdfIn PDF document text
    • http://samtekelektrik.com/files/51466834858.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/nsnlg4tujhvqa4u7nah02jkun3/1086843190.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/0141c6a054a7ef8b8c97aa01d2674d8a/31375537730.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/7c28115cb370a221ff366f26109bbf8f/50402679146.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/betazezosobew.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/f340e255adc84df0abdcefcc800d729d/xevesepasepitoned.pdfIn PDF document text
    • http://vanhacollection.com/images/files/winesumokezutunasofafegu.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084af74e02f4---nivel.pdfIn PDF document text
    • http://livilgirls.com/files/26351839358.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/dewisenajira.pdfIn PDF document text
    • http://www.irrv.org/uploads/files/jiwutomofiti.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/4f4b92b4d1776bbb7c393a91a8f2b7f4/55844599376.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16096451de62c8---mufazimazopowak.pdfIn PDF document text
    • https://eubeer.vn/uploads/files/voxuvama.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=love+movies+tamil+dubbedPDF 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_off0000b964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB964 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17B 10468 bytes
SHA-256: c34d3b3922881bc479d3e222a569f021eb4620a6732a898b9b21e6b8c6f6289d
font_02_sfnt_off0000e94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94D 16704 bytes
SHA-256: 8cb15ddd7ca152f19021018d3dfdd2a1471ef34e0d81d3ae3a93cb339475c739

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