MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of callback phishing. The document body is heavily obfuscated, but heuristics indicate the presence of embedded JavaScript and a lure to contact a phone number for issues like billing or subscription disputes. The numerous embedded URLs, many pointing to potentially disposable domains, suggest an attempt to host malicious content or redirect users. No scripts were extracted, but the PDF structure and heuristics strongly suggest a phishing or scam attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9960
Heuristics 7
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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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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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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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 http://ke-sen.com/userfiles/file/1631137491.pdf In PDF document text
- http://anabakorea.jp/userfiles/file/88020876202.pdfIn PDF document text
- https://rubin2000-distribuitorshop.ro/userfiles/file/lifakorodu.pdfIn PDF document text
- https://www.l-games.jp/js/ckfinder/userfiles/files/26917720873.pdfIn PDF document text
- http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7b6ed8ef0---84898678415.pdfIn PDF document text
- http://connectcontrol.net/files/userfiles/files/34062478124.pdfIn PDF document text
- https://www.meditech.cz/ckfinder/userfiles/files/fugosototareweserudumi.pdfIn PDF document text
- http://thebookmarkcafe.com/uploads/files/86136342506.pdfIn PDF document text
- http://insp.biz/img/file/zemetatamexesaf.pdfIn PDF document text
- http://reversetheclocknow.com/ckfinder/userfiles/files/58083651798.pdfIn PDF document text
- https://atlantidegattico.it/file/bojekunarajefajuno.pdfIn PDF document text
- http://mbjarrahi.com/UploadedFiles/New/file/kipumelidenozepavusekomex.pdfIn PDF document text
- https://thibiditrading.com/public/userupload/files/81269545760.pdfIn PDF document text
- https://avflash.nl/upload/files/xonitikorovum.pdfIn PDF document text
- http://ffarchitettura.it/userfiles/files/fisugimejosesi.pdfIn PDF document text
- https://dm288.com/slicice/file/90555206891.pdfIn PDF document text
- http://khiensa.com/UserFiles/File/80596711544.pdfIn PDF document text
- http://anhuishangbiao.com/upload_fck/file/2021-9-7/20210907160304137297.pdfIn PDF document text
- http://studioagronomoserragiotto.eu/userfiles/files/kanig.pdfIn PDF document text
- http://yokosohk.com/files/fckfiles/file/65836806675.pdfIn PDF document text
- http://maychaybocaocap.com/app/webroot/uploads/files/fifolibodobibuxa.pdfIn PDF document text
- https://www.abandassociates.com/ckfinder/userfiles/files/rusakugaxetabewosepe.pdfIn PDF document text
- http://lienming-rubber.com/uploads/files/202109111633005767.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=note+9+battery+drain+after+updatePDF 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.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000de85.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDE85 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000f69c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF69C | 10776 bytes |
SHA-256: f3760af61bcbdd092e879b808a4fa63709d091337e4f9fe0880abc4264eafc2c |
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font_02_sfnt_off00010f65.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10F65 | 17928 bytes |
SHA-256: 576ba164dbec82637e25aff76e83ca1712571f036d80ca64505a46eecd908765 |
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