MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous URLs that lead to various websites, including those hosted on compromised WordPress upload directories. The embedded document body text, though partially garbled, contains a string related to downloading MP3s, suggesting a lure to entice users to click the links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF 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.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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://krisoc.ru/uplcv?utm_term=i+wish+you+happy+happy+birthday+song+download+mp3 PDF link annotation
- https://chetanaus.org/bheru/uploadfiles/file/36903616190.pdfIn PDF document text
- https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/a121808d8030ae5d511a8ad8c5e93895/79036431392.pdfIn PDF document text
- https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/gasfp4703lhkfa4ath0h1ekgrs/zuleba.pdfIn PDF document text
- https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/cj3613jffhrbtsfcc4589n8d76/3009864558.pdfIn PDF document text
- https://luminex.pl/upload/file/furamuvudaxoki.pdfIn PDF document text
- http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f066e0ccf6---juwebiketujulekefavabeled.pdfIn PDF document text
- http://www.fonfe.com/uploads/files/fomaji.pdfIn PDF document text
- https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/9748d0fdc910f6a6c4ca76a89a162823/23201061134.pdfIn PDF document text
- https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/c87c27564d2d8c8cd4efd884bca1fc42/93200286712.pdfIn PDF document text
- http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071d22fa0501---tivukowerajojov.pdfIn PDF document text
- http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8cd5ab50f5---gorepobiduzotutegi.pdfIn PDF document text
- http://axiomestates.com/userfiles/file/6198019138.pdfIn PDF document text
- http://mg001.cn/upload_fck/file/2021-5-12/20210512181409301519.pdfIn PDF document text
- http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1686fbd964---59690049548.pdfIn PDF document text
- http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/kcp0p16evpiea6d4bgj01oam37/30202483366.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000df39.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDF39 | 5808 bytes |
SHA-256: a3839c9ff3c357db4ad2ec56fd5ba46d5371123a0d2c208ac03ad65dc0e6eb86 |
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font_01_sfnt_off0000f2ea.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF2EA | 11076 bytes |
SHA-256: e7ac9f9d4a642637c4feb0c73d8756ff2064de00dc4396cac19590101106a45d |
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