Malicious PDF — malware analysis report

Static analysis result for SHA-256 4508422255ab154c…

MALICIOUS

PDF

99.7 KB Created: 2021-07-26 05:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d0482d46252482ce96422b4f22ad41a2 SHA-1: 4478ac63f8bfa9fdc414228740cfef4107cc9b35 SHA-256: 4508422255ab154cf9850c6456a156f00de91c09520a647782f0da89033dba1a
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, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of multiple distinct hosts and the use of UTM parameters suggest an effort to obscure the ultimate destination and potentially track user engagement.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d24dfa835ce---87970585776.pdf In PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad910536830---jivipopimukewos.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/607856d2e1ee458259792d3005c6078c/8131460691.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/raxusavozejotabo.pdfIn PDF document text
    • http://liyangah.com/Upload/file/53526053149.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/512fa0a758585c5f0df659a0ffe03d58/2275087852.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/90d3dfb637aa300487dbc27fa2404620/redemid.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609cde8acfa7b---gokokusudolaxogi.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/niwok.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/3bd6f7eaf5ed44853438bca4a45a97e8/30428229981.pdfIn PDF document text
    • http://yoron.net/up/files/sakisogiwasil.pdfIn PDF document text
    • https://efsanepin.com/calisma2/files/uploads/19984096592.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/kkj3rp4q4odaljn4dv98iqg4e0/64048988399.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/danamubudot.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/95194887399.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/t6hile77n1duh8c4029a1ev090/5570306282.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/lituv.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/3a77262764beab02b4f8622c9276a403/jukutarafajitedotu.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/0843d0298bcec04bd0068975f9d2a70a/kasemizewif.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/81486088800.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d96570183d---50010165913.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/80358070471.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=win+10+1909+iso+google+drivePDF 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_off00011861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11861 10564 bytes
SHA-256: d10ccb1a9164aabc961413cf8cf6ac903f2c15f528f49230019223922985d01e
font_01_sfnt_off00013067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13067 26708 bytes
SHA-256: 1a878f4ff22fa3e67c84bf9baec7aef1f4dfb027d8079062cc7ca4a67b3ab8ac
font_02_sfnt_off0001667a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1667A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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